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extractor.py
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extractor.py
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import json
from nltk.corpus import stopwords, wordnet
from nltk.stem import WordNetLemmatizer
SUBGRAPH_PATTERNS = [
{'pos':['V', 'N', 'NOT', 'N', 'JJ', 'V', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1, 2, 3, 4], 4:[5], 5:[6]}},
{'pos':['V', 'N', 'NOT', 'N', 'N', 'V', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1, 2, 3, 4], 4:[5], 5:[6]}},
{'pos':['V', 'N', 'NOT', 'N', 'V', 'N', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'obj', 'xcomp', 'obj', 'mark'], 'child':{0:[1,2, 3, 4], 4:[5, 6]}},
{'pos':['V', 'N', 'N', 'V', 'N', 'TO'], 'dependency':['root', 'nsubj', 'obj', 'xcomp', 'obj', 'mark'], 'child':{0:[1,2, 3], 3:[4, 5]}},
{'pos':['V', 'NOT', 'N', 'V', 'N', 'TO'], 'dependency':['conj', 'advmod', 'obj', 'xcomp', 'obj', 'mark'], 'child':{0:[1,2, 3], 3:[4, 5]}},
{'pos':['V', 'N', 'N', 'JJ', 'V', 'TO'], 'dependency':['root', 'nsubj', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1, 2, 3], 3:[4], 4:[5]}},
{'pos':['V', 'NOT', 'N', 'JJ', 'V', 'TO'], 'dependency':['conj', 'advmod', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1, 2, 3], 3:[4], 4:[5]}},
{'pos':['V', 'N', 'NOT', 'N', 'N', 'IN'], 'dependency':['root', 'nsubj', 'advmod', 'obj', 'obl', 'case'], 'child':{0:[1, 2, 3], 3:[4], 4:[5]}},
{'pos':['JJ', 'N', 'NOT', 'V', 'N', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'xcomp', 'obj', 'mark'], 'child':{0:[1, 2, 3], 3:[4, 5]}},
{'pos':['V', 'N', 'N', 'N', 'V', 'TO'], 'dependency':['root', 'nsubj', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2, 3], 3:[4], 4:[5]}},
{'pos':['V', 'NOT', 'N', 'N', 'V', 'TO'], 'dependency':['conj', 'advmod', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2, 3], 3:[4]}},
{'pos':['V', 'N', 'NOT', 'N', 'N', 'IN'], 'dependency':['root', 'nsubj', 'advmod', 'obj', 'obl', 'case'], 'child':{0:[1,2, 3, 4], 4:[5]}},
{'pos':['V', 'N', 'NOT', 'JJ', 'V', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2,3], 3:[4], 4:[5]}},
{'pos':['V', 'N', 'NOT', 'N', 'V', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2,3], 3:[4], 4:[5]}},
{'pos':['V', 'N', 'NOT', 'V', 'N', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'xcomp', 'obj', 'mark'], 'child':{0:[1,2,3], 3:[4, 5]}},
{'pos':['V', 'N', 'N', 'V', 'TO'], 'dependency':['conj', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2], 2:[3], 3:[4]}},
{'pos':['V', 'N', 'JJ', 'V', 'TO'], 'dependency':['conj', 'obj', 'xcomp', 'cop', 'mark'], 'child':{0:[1, 2], 2:[3], 3:[4]}},
{'pos':['V', 'N', 'N', 'N', 'IN'], 'dependency':['root', 'nsubj', 'obj', 'obl', 'case'], 'child':{0:[1, 2], 2:[3], 3:[4]}},
{'pos':['V', 'NOT', 'N', 'N', 'IN'], 'dependency':['conj', 'advmod', 'obj', 'obl', 'case'], 'child':{0:[1,2], 2:[3], 3:[4]}},
{'pos':['V', 'N', 'NOT', 'N', 'N'], 'dependency':['root', 'nsubj', 'advmod', 'iobj', 'obj'], 'child':{0:[1, 2, 3, 4]}},
{'pos':['JJ', 'N', 'V', 'N', 'TO'], 'dependency':['root', 'nsubj', 'xcomp', 'obj', 'mark'], 'child':{0:[1, 2], 2:[3, 4]}},
{'pos':['JJ', 'NOT', 'V', 'N', 'TO'], 'dependency':['root', 'advmod', 'xcomp', 'obj', 'mark'], 'child':{0:[1, 2], 2:[3, 4]}},
{'pos':['JJ', 'N', 'NOT', 'N', 'IN'], 'dependency':['root', 'nsubj', 'advmod', 'obl', 'case'], 'child':{0:[1, 2, 3], 3:[4]}},
{'pos':['V', 'N', 'V', 'N', 'TO'], 'dependency':['root', 'nsubj', 'xcomp', 'obj', 'mark'], 'child':{0:[1,2], 2:[3, 4]}},
{'pos':['V', 'NOT', 'V', 'N', 'TO'], 'dependency':['conj', 'advmod', 'xcomp', 'obj', 'mark'], 'child':{0:[1,2], 2:[3, 4]}},
{'pos':['V', 'N', 'NOT', 'N', 'IN'], 'dependency':['root', 'nsubj:pass', 'advmod', 'obl', 'case'], 'child':{0:[1,2,3], 3:[4]}},
{'pos':['V', 'N', 'NOT', 'N', 'IN'], 'dependency':['root', 'nsubj', 'advmod', 'obl', 'case'], 'child':{0:[1,2,3], 3:[4]}},
{'pos':['V', 'N', 'V', 'N', 'TO'], 'dependency':['conj', 'obj', 'xcomp', 'obj', 'mark'], 'child':{0:[1,2], 2:[3, 4]}},
{'pos':['V', 'N', 'N', 'N', 'IN'], 'dependency':['root', 'nsubj', 'obj', 'obl', 'case'], 'child':{0:[1,2, 3], 3:[4]}},
{'pos':['V', 'NOT', 'N', 'N', 'IN'], 'dependency':['conj', 'advmod', 'obj', 'obl', 'case'], 'child':{0:[1,2,3], 3:[4]}},
{'pos':['V', 'N', 'JJ', 'V', 'TO'], 'dependency':['root', 'nsubj', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2], 2:[3], 3:[4]}},
{'pos':['V', 'NOT', 'JJ', 'V', 'TO'], 'dependency':['conj', 'advmod', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2], 2:[3], 3:[4]}},
{'pos':['V', 'N', 'N', 'V', 'TO'], 'dependency':['root', 'nsubj', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2], 2:[3], 3:[4]}},
{'pos':['V', 'NOT', 'N', 'V', 'TO'], 'dependency':['conj', 'advmod', 'xcomp', 'cop', 'mark'], 'child':{0:[1,2], 2:[3], 3:[4]}},
{'pos':['V', 'N', 'NOT', 'V', 'TO'], 'dependency':['root', 'nsubj', 'advmod', 'xcomp', 'mark'], 'child':{0:[1,2,3], 3:[4]}},
{'pos':['V', 'N', 'N', 'IN'], 'dependency':['conj', 'obj', 'obl', 'case'], 'child':{0:[1], 1:[2], 2:[3]}},
{'pos':['V', 'N', 'N', 'N'], 'dependency':['root', 'nsubj', 'iobj', 'obj'], 'child':{0:[1, 2, 3]}},
{'pos':['V', 'NOT', 'N', 'N'], 'dependency':['conj', 'advmod', 'iobj', 'obj'], 'child':{0:[1, 2, 3]}},
{'pos':['JJ', 'V', 'N', 'TO'], 'dependency':['root', 'xcomp', 'obj', 'mark'], 'child':{0:[1], 1:[2, 3]}},
{'pos':['JJ', 'N', 'N', 'IN'], 'dependency':['root', 'nsubj', 'obl', 'case'], 'child':{0:[1, 2], 2:[3]}},
{'pos':['JJ', 'NOT', 'N', 'IN'], 'dependency':['conj', 'advmod', 'obl', 'case'], 'child':{0:[1,2], 2:[3]}},
{'pos':['V', 'N', 'V', 'TO'], 'dependency':['root', 'nsubj', 'xcomp', 'mark'], 'child':{0:[1,2], 2:[3]}},
{'pos':['V', 'JJ', 'V', 'TO'], 'dependency':['conj', 'xcomp', 'cop', 'mark'], 'child':{0:[1], 1:[2], 2:[3]}},
{'pos':['V', 'N', 'N', 'IN'], 'dependency':['conj', 'obj', 'obl', 'case'], 'child':{0:[1,2], 2:[3]}},
{'pos':['V', 'N', 'V', 'TO'], 'dependency':['conj', 'xcomp', 'cop', 'mark'], 'child':{0:[1], 1:[2], 2:[3]}},
{'pos':['V', 'V', 'N', 'TO'], 'dependency':['conj', 'xcomp', 'obj', 'mark'], 'child':{0:[1], 1:[2, 3]}},
{'pos':['V', 'N', 'N', 'IN'], 'dependency':['root', 'nsubj', 'obl', 'case'], 'child':{0:[1,2], 2:[3]}},
{'pos':['V', 'N', 'N', 'IN'], 'dependency':['root', 'nsubj:pass', 'obl', 'case'], 'child':{0:[1,2], 2:[3]}},
{'pos':['V', 'NOT', 'N', 'IN'], 'dependency':['conj', 'advmod', 'obl', 'case'], 'child':{0:[1,2], 2:[3]}},
{'pos':['V', 'N', 'NOT', 'N'], 'dependency':['root', 'nsubj', 'advmod', 'obj'], 'child':{0:[1,2,3]}},
{'pos':['V', 'NOT', 'V', 'TO'], 'dependency':['conj', 'advmod', 'xcomp', 'mark'], 'child':{0:[1,2], 2:[3]}},
{'pos':['JJ', 'N', 'NOT', 'V'], 'dependency':['root', 'nsubj', 'advmod', 'cop'], 'child':{0:[1,2,3]}},
{'pos':['V', 'N', 'NOT', 'JJ'], 'dependency':['root', 'nsubj', 'advmod', 'xcomp'], 'child':{0:[1,2,3]}},
{'pos':['V', 'N', 'NOT', 'RP'], 'dependency':['root', 'nsubj', 'advmod', 'compound:prt'], 'child':{0:[1,2,3]}},
{'pos':['JJ', 'N', 'IN'], 'dependency':['conj', 'obl', 'case'], 'child':{0:[1], 1:[2]}},
{'pos':['V', 'N', 'N'], 'dependency':['conj', 'iobj', 'obj'], 'child':{0:[1, 2]}},
{'pos':['V', 'N', 'RP'], 'dependency':['root', 'nsubj', 'compound:prt'], 'child':{0:[1,2]}},
{'pos':['V', 'N', 'NOT'], 'dependency':['root', 'nsubj', 'advmod'], 'child':{0:[1,2]}},
{'pos':['V', 'N', 'JJ'], 'dependency':['root', 'nsubj', 'xcomp'], 'child':{0:[1,2]}},
{'pos':['V', 'NOT', 'JJ'], 'dependency':['conj', 'advmod', 'xcomp'], 'child':{0:[1,2]}},
{'pos':['JJ', 'N', 'V'], 'dependency':['root', 'nsubj', 'cop'], 'child':{0:[1,2]}},
{'pos':['JJ', 'NOT', 'V'], 'dependency':['conj', 'advmod', 'cop'], 'child':{0:[1,2]}},
{'pos':['V', 'N', 'IN'], 'dependency':['conj', 'obl', 'case'], 'child':{0:[1], 1:[2]}},
{'pos':['V', 'NOT', 'N'], 'dependency':['conj', 'advmod', 'obj'], 'child':{0:[1,2]}},
{'pos':['V', 'N', 'N'], 'dependency':['root', 'nsubj', 'obj'], 'child':{0:[1,2]}},
{'pos':['V', 'V', 'TO'], 'dependency':['conj', 'xcomp', 'mark'], 'child':{0:[1], 1:[2]}},
{'pos':['V', 'N', 'NOT'], 'dependency':['root', 'nsubj:pass', 'advmod'], 'child':{0:[1,2]}},
{'pos':['V', 'NOT', 'RP'], 'dependency':['conj', 'advmod', 'compound:prt'], 'child':{0:[1,2]}},
{'pos':['V', 'RP'], 'dependency':['conj', 'compound:prt'], 'child':{0:[1]}},
{'pos':['JJ', 'V'], 'dependency':['conj', 'cop'], 'child':{0:[1]}},
{'pos':['V', 'JJ'], 'dependency':['conj', 'xcomp'], 'child':{0:[1]}},
{'pos':['V', 'N'], 'dependency':['root', 'nsubj'], 'child':{0:[1]}},
{'pos':['V', 'N'], 'dependency':['root', 'nsubj:pass'], 'child':{0:[1]}},
{'pos':['V', 'NOT'], 'dependency':['conj', 'advmod'], 'child':{0:[1]}},
{'pos':['V', 'N'], 'dependency':['conj', 'obj'], 'child':{0:[1]}},
{'pos':['V'], 'dependency':['conj'], 'child':{0:[]}},
]
class Extractor():
def __init__(self):
self.extract_res = [] #{sentence: tuple}
self.all_events = {} #{tuple: frequence}
self.sentence = None
self.pos = None
self.dependency = None
self.child = None
def match_pattern(self, idx, pattern, loc, CodeNameId):
pat_len = len(pattern['pos'])
if trans_pos(self.pos[idx][1], self.sentence[idx]) == pattern['pos'][loc] and (self.dependency[idx][0] == pattern['dependency'][loc] or loc == 0):
if loc not in pattern['child']:
word_loc = [idx]
return word_loc, CodeNameId, idx, idx
elif idx in self.child:
word_loc = []
i = 0
j = 0
min_idx = max_idx = idx
while j < len(pattern['child'][loc]):
while i < len(self.child[idx]):
res, CodeNameId, _min_idx, _max_idx = self.match_pattern(self.child[idx][i], pattern, pattern['child'][loc][j], CodeNameId)
i += 1
if res != None:
word_loc += res
j += 1
max_idx = max(_max_idx, max_idx)
min_idx = min(_min_idx, min_idx)
break
if i == len(self.child[idx]):
break
if j == len(pattern['child'][loc]):
word_loc = [idx] + word_loc
return word_loc, CodeNameId, min_idx, max_idx
return None, CodeNameId, idx, idx
def find_subgraph(self, info):
self.sentence = info['word']
self.pos = info['pos']
Len = len(self.sentence)
#sort the dependency
def by_head(Tuple):
return Tuple[-1]
self.dependency = sorted(info['dependency'], key=by_head)
#process child nodes
self.child = {}
for i in range(Len):
if self.dependency[i][1] != 0:
if (self.dependency[i][1] - 1) not in self.child:
self.child[self.dependency[i][1] - 1] = []
self.child[self.dependency[i][1] - 1].append(i)
subgraphs = []
i = 0
while i < Len:
for pattern in SUBGRAPH_PATTERNS:
codenameid = int(pattern['dependency'][0] == 'conj')
word_loc, _, min_idx, max_idx = self.match_pattern(i, pattern, 0, codenameid)
if word_loc is not None:
words = [self.sentence[i] for i in word_loc]
res = pattern.copy()
res['words'] = words
res['loc'] = word_loc
subgraphs.append(res)
i = max_idx
break
i += 1
return subgraphs
def subg2event(self, subgraphs):
events = []
for subg in subgraphs:
event = []
for node in subg['child']:
for child in subg['child'][node]:
event.append((subg['words'][node], subg['dependency'][child], subg['words'][child]))
events.append(tuple(event))
return events
def subg2str(self, subgraphs):
strs = []
for subg in subgraphs:
pair = zip(subg['loc'], subg['words'])
pair = sorted(pair, key = lambda k: k[0])
word_in_order = [j for (i, j) in pair]
strs.append(' '.join(word_in_order))
return strs
def extract(self, story_info):
event_list = []
Len = len(story_info)
for sent_info in story_info:
#print('Sentence: ' + sent_info['sentence'])
sent_info['word'] = lemmatize_sentence(sent_info['pos'])
subgraphs = self.find_subgraph(sent_info)
strs = self.subg2str(subgraphs)
event_list.append(strs)
return event_list
def get_wordnet_pos(treebank_tag):
if treebank_tag.startswith('J'):
return wordnet.ADJ
elif treebank_tag.startswith('V'):
return wordnet.VERB
elif treebank_tag.startswith('N'):
return wordnet.NOUN
elif treebank_tag.startswith('R'):
return wordnet.ADV
else:
return None
def lemmatize_sentence(pos_tag):
res = []
lemmatizer = WordNetLemmatizer()
for pos in pos_tag:
word, pos = pos
word = word.lower()
wordnet_pos = get_wordnet_pos(pos)
if wordnet_pos:
res.append(lemmatizer.lemmatize(word, wordnet_pos))
else:
res.append(word)
return res
def trans_pos(pos, word):
if pos.startswith('V'):
return 'V'
if pos.startswith('JJ'):
return 'JJ'
if pos.startswith('N') or pos == 'PRP':
return 'N'
if pos == 'RB' and (word == 'n\'t' or word == 'not'):
return 'NOT'
return pos