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README.md

neural-template-gen

Code for Learning Neural Templates for Text Generation (Wiseman, Shieber, Rush; EMNLP 2018)

For questions/concerns/bugs please feel free to email swiseman[at]ttic.edu.

N.B. This code was tested with python 2.7 and pytorch 0.3.1.

Data and Data Preparation

The E2E NLG Challenge data is available here, and the preprocessed version of the data used for training is at data/e2e_aligned.tar.gz. This preprocessed data uses the same database record preprocessing scheme applied by Sebastian Gehrmann in his system, and also annotates text spans that occur in the corresponding database. Code for annotating the data in this way is at data/make_e2e_labedata.py.

The WikiBio data is available here, and the preprocessed version of the target-side data used for training is at data/wb_aligned.tar.gz. This target-side data is again preprocessed to annotate spans appearing in the corresponding database. Code for this annotation is at data/make_wikibio_labedata.py. The source-side data can be downloaded directly from the WikiBio repo, and we used it unchanged; in particular the *.box files become our src_*.txt files mentioned below.

The code assumes that each dataset lives in a directory containing src_train.txt, train.txt, src_valid.txt, and valid.txt files, and that if the files are from the WikiBio dataset the directory name will contain the string wiki.

Training

The four trained models mentioned in the paper can be downloaded here. The commands for retraining the models are given below.

Assuming your E2E data is in data/labee2e/, you can train the non-autoregressive model as follows

python chsmm.py -data data/labee2e/ -emb_size 300 -hid_size 300 -layers 1 -K 55 -L 4 -log_interval 200 -thresh 9 -emb_drop -bsz 15 -max_seqlen 55 -lr 0.5 -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 5 -mlpinp -onmt_decay -cuda -seed 1818 -save models/chsmm-e2e-300-55-5.pt

and the autoregressive model as follows.

python chsmm.py -data data/labee2e/ -emb_size 300 -hid_size 300 -layers 1 -K 55 -L 4 -log_interval 200 -thresh 9 -emb_drop -bsz 15 -max_seqlen 55 -lr 0.5 -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 5 -mlpinp -onmt_decay -cuda -seed 1111 -save models/chsmm-e2e-300-55-5-far.pt -ar_after_decay

Assuming your WikiBio data is in data/labewiki, you can train the non-autoregressive model as follows

python chsmm.py -data data/labewiki/ -emb_size 300 -hid_size 300 -layers 1 -K 45 -L 4 -log_interval 1000 -thresh 29 -emb_drop -bsz 5 -max_seqlen 55 -lr 0.5 -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 3 -mlpinp -onmt_decay -cuda -save models/chsmm-wiki-300-45-3.pt

and the autoregressive model as follows.

python chsmm.py -data data/labewiki/ -emb_size 300 -hid_size 300 -layers 1 -K 45 -L 4 -log_interval 1000 -thresh 29 -emb_drop -bsz 5 -max_seqlen 55 -lr 0.5 -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 3 -mlpinp -onmt_decay -cuda -save models/chsmm-wiki-300-45-3-war.pt -ar_after_decay -word_ar

The above scripts will also attempt to save to a models/ directory (which must be created first). Also see chsmm.py for additional training and model options.

N.B. training is somewhat sensitive to the random seed, and it may be necessary to try several seeds in order to get the best performance.

Viterbi Segmentation/Template Extraction

Once you've trained a model, you can use it to compute the Viterbi segmentation of the training data, which we use to extract templates. A gzipped tarball containing Viterbi segmentations corresponding to the four models above can be downloaded here.

You can rerun the segmentation for the non-autoregressive E2E model as follows

python chsmm.py -data data/labee2e/ -emb_size 300 -hid_size 300 -layers 1 -K 55 -L 4 -log_interval 200 -thresh 9 -emb_drop -bsz 16 -max_seqlen 55 -lr 0.5  -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 5 -mlpinp -onmt_decay -cuda -load models/e2e-55-5.pt -label_train | tee segs/seg-e2e-300-55-5.txt

and for the autoregressive one as follows.

python chsmm.py -data data/labee2e/ -emb_size 300 -hid_size 300 -layers 1 -K 60 -L 4 -log_interval 200 -thresh 9 -emb_drop -bsz 16 -max_seqlen 55 -lr 0.5  -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 1 -mlpinp -onmt_decay -cuda -load models/e2e-60-1-far.pt -label_train -ar_after_decay | tee segs/seg-e2e-300-60-1-far.txt

You can rerun the segmentation for the non-autoregressive WikiBio model as follows

python chsmm.py -data data/labewiki/ -emb_size 300 -hid_size 300 -layers 1 -K 45 -L 4 -log_interval 200 -thresh 29 -emb_drop -bsz 16 -max_seqlen 55 -lr 0.5  -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 3 -mlpinp -onmt_decay -cuda -load models/wb-45-3.pt -label_train | tee segs/seg-wb-300-45-3.txt

and for the autoregressive one as follows.

python chsmm.py -data data/labewiki/ -emb_size 300 -hid_size 300 -layers 1 -K 45 -L 4 -log_interval 200 -thresh 29 -emb_drop -bsz 16 -max_seqlen 55 -lr 0.5  -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 3 -mlpinp -onmt_decay -cuda -load models/wb-45-3-war.pt -label_train | tee segs/seg-wb-300-45-3-war.txt

The above scripts write the MAP segmentations (in text) to standard out. Above, they have been redirected to a segs/ directory.

Examining and Extracting Templates

The template_extraction.py script can be used to extract templates from the segmentations produced as above, and to look at them. In particular, extract_from_tagged_data() returns the most common templates, and mappings from these templates to sentences, and from states to phrases. This script is also used in generation (see below).

Generation

Once a model has been trained and the MAP segmentations created, we can generate by limiting to (for instance) the top 100 extracted templates.

The following command will generate on the E2E validation set using the autoregressive model:

python chsmm.py -data data/labee2e/ -emb_size 300 -hid_size 300 -layers 1 -dropout 0.3 -K 60 -L 4 -log_interval 100 -thresh 9 -lr 0.5 -sep_attn -unif_lenps -emb_drop -mlpinp -onmt_decay -one_rnn -max_pool -gen_from_fi data/labee2e/src_uniq_valid.txt -load models/e2e-60-1-far.pt -tagged_fi segs/seg-e2e-60-1-far.txt -beamsz 5 -ntemplates 100 -gen_wts '1,1' -cuda -min_gen_tokes 0 > gens/gen-e2e-60-1-far.txt

The following command will generate on the WikiBio test using the autoregressive model:

python chsmm.py -data data/labewiki/ -emb_size 300 -hid_size 300 -layers 1 -K 45 -L 4 -log_interval 1000 -thresh 29 -emb_drop -bsz 5 -max_seqlen 55 -lr 0.5 -sep_attn -max_pool -unif_lenps -one_rnn -Kmul 3 -mlpinp -onmt_decay -cuda -gen_from_fi wikipedia-biography-dataset/test/test.box -load models/wb-45-3-war.pt -tagged_fi segs/seg-wb-300-45-3-war.txt -beamsz 5 -ntemplates 100 -gen_wts '1,1' -cuda -min_gen_tokes 20 > gens/gen-wb-45-3-war.txt

Generations from the other models can be obtained analogously, by substituting in the correct arguments for -data (path to data directory), -gen_from_fi (the source file from which to generate), -load (path to the saved model), and -tagged_fi (path to the MAP segmentations under the corresponding model). See chsmm.py for additional generation options.

N.B. The format of the generations is: <generation>|||<segmentation>, where <segmentation> provides the segmentation used in generating. As such, all the text beginning with '|||' should be stripped off before evaluating the generations.

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