MSMARCO with S-NET Extraction (Extraction-net)

• A CNTK(Microsoft deep learning toolkit) implementation of S-NET: FROM ANSR EXTRACTION TO ANSWER GENERATION FOR MACHINE READING COMPREHENSION extraction part with some modifications.
• This project is designed for the MSMARCO dataset
• Code structure is based on CNTK BIDAF Example
• Support MSMARCO V1 and V2!

Requirements

Here are some required libraries for training and evaluations.

General

• python3.6
• cuda-9.0 (CNTK required)
• openmpi-1.10 (CNTK required)
• gcc >= 6 (CNTK required)

Python

• Please refer requirements.txt

Evaluate with pretrained model

This repo provides pretrained model and pre-processed validation dataset for testing the performance

Please download pretrained model and pre-processed data and put them on the MSMARCO/data and MSMARCO root directory respectively, then decompress them at the right places.

The code structure should be like

MSMARCO
├── data
│   ├── elmo_embedding.bin
│   ├── test.tsv
│   ├── vocabs.pkl
│   ├── data.tar.gz
│   └── ... others
├── model
│   ├── pm.model
│   ├── pm.model.ckp
│   └── pm.model_out.json
└── ... others

After decompressing,

cd Evaluation
sh eval.sh

then you should get the generated answer and rough-l score.

Usage

Preprocess

MSMARCO V1

Download MSMARCO v1 dataset, GloVe embedding.

cd data
python3.6 download.py v1

Convert raw data to tsv format

python3.6 convert_msmarco.py v1 --threads=`nproc` 

Convert tsv format to ctf(CNTK input) format and build vocabs dictionary

python3.6 tsv2ctf.py

Generate elmo embedding

sh elmo.sh

MSMARCO V2

Download MSMARCO v2 dataset, GloVe embedding.

cd data
python3.6 download.py v2

Convert raw data to tsv format

python3.6 convert_msmarco.py v2 --threads=`nproc`

Convert tsv format to ctf(CNTK input) format and build vocabs dictionary

python3.6 tsv2ctf.py

Generate elmo embedding

sh elmo.sh

Train (Same for V1 and V2)

cd ../script
mkdir log
sh run.sh

Evaluate develop dataset

MSMARCO V1

cd Evaluation
sh eval.sh v1

MSMARCO v2

cd Evaluation
sh eval.sh v2

Performance

Paper

	rouge-l	bleu_1
S-Net (Extraction)	41.45	44.08
S-Net (Extraction, Ensemble)	42.92	44.97

This implementation

	rouge-l	bleu_1
MSMARCO v1 w/o elmo	38.43	39.14
MSMARCO v1 w/ elmo	39.42	39.47
MSMARCO v2 w/ elmo	43.66	44.44

TODO

• Multi-threads preprocessing
• Elmo-Embedding
• Evaluation script
• MSMARCO v2 support
• Reasonable metrics