ACE_preprocessing

This is a simple code for preprocessing ACE 2005 corpus for Event Extraction task. Note that ACE 2005 dataset is not free.

I have some modification from repo : https://github.com/nlpcl-lab/ace2005-preprocessing.git I don't use PosTag and Dependency parsing. avoid error 'sentence too long' and > 2 sentences when use Stanford parser

Some modification on dataset file:

• ETNew york -> ET new york
• aig.greenberg -> aig. greenberg
• (entity tag) he new chairman -> the new chair man
• (event tag) s->'s
• (sgm file) .4 % => 4%

Tool

Download stanford-corenlp model.

wget http://nlp.stanford.edu/software/stanford-corenlp-full-2018-10-05.zip
unzip stanford-corenlp-full-2018-10-05.zip

Data split:

The data segmentation is specified in data_list.csv

Format:

conll format

I have created some format for many target:

 <word> <tab> <tag event for trigger> <tab> <tag Name entity>

• full form: [tag Name entiy] and [tag event for trigger] are in long format: [BOI-tag]-[Type]:[Sub-type]
• short form: [tag Name entiy] and [tag event for trigger] are in short format: only [sub-type]
• without Name Entity: [word] [tab] [tag event for trigger][\n]

Json format:

[
  {
    "sentence": "He visited all his friends.",
    "tokens": ["He", "visited", "all", "his", "friends", "."],
    "pos-tag": ["PRP", "VBD", "PDT", "PRP$", "NNS", "."],
    "golden-entity-mentions": [
      {
        "text": "He", 
        "entity-type": "PER:Individual",
        "start": 0,
        "end": 0
      },
      {
        "text": "his",
        "entity-type": "PER:Group",
        "start": 3,
        "end": 3
      },
      {
        "text": "all his friends",
        "entity-type": "PER:Group",
        "start": 2,
        "end": 5
      }
    ],
    "golden-event-mentions": [
      {
        "trigger": {
          "text": "visited",
          "start": 1,
          "end": 1
        },
        "arguments": [
          {
            "role": "Entity",
            "entity-type": "PER:Individual",
            "text": "He",
            "start": 0,
            "end": 0
          },
          {
            "role": "Entity",
            "entity-type": "PER:Group",
            "text": "all his friends",
            "start": 2,
            "end": 5
          }
        ],
        "event_type": "Contact:Meet"
      }
    ],
    "parse": "(ROOT\n  (S\n    (NP (PRP He))\n    (VP (VBD visited)\n      (NP (PDT all) (PRP$ his) (NNS friends)))\n    (. .)))"
  }
]

	Documents	Sentences	Event Mentions	Entity Mentions
Test	40	750	424	4226
Dev	30	958	505	4050
Train	529	16307	4420	53045