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Knowledge-based Word Sense Disambiguation
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README.md

This code is an implementation of the Knowledge-based Word Sense Disambiguation (KWSD) Framework that exploits knowledge from different perspectives. In detail, it makes use of knowledge from Wikipedia and WordNet in a similarity-based WSD method and combines the method with a graph-based WSD method in some personalized settings such as top_3 senses filtration, customized sense graph construction and sense importance inheritance. State-of-the-art performance on several standard WSD datasets has proven the effectiveness of such a knowledge-exploitation framework.

Quick Evaluation

You can make use of the evaluation code provided in [1]. Before that, you should download the evaluation framework on the website EACL17. In this resource, you can use the scoror.java to evaluate the performance of our system on different datasets once at a time with the following code, using the files such as 'senseval2.raw.KWSD.key'.

java Scorer senseval2/senseval2.gold.key.txt senseval2.raw.KWSD.key

Also, you can use the evaluation code from UKB website, UKB[2]. Then use evaluate.sh to conduct evaluation after you move our result document 'raw.KWSD.key' into ukb-3.2/wsdeval/Keys/raw. The result is supposed to be as follows:

./evaluate.sh

Evaluating in Keys
/* raw.KWSD

ALL P= 68.0% R= 68.0% F1= 68.0%
semeval2007 P= 56.9% R= 56.9% F1= 56.9%
semeval2013 P= 68.4% R= 68.4% F1= 68.4%
semeval2015 P= 72.3% R= 72.3% F1= 72.3%
senseval2 P= 69.6% R= 69.6% F1= 69.6%
senseval3 P= 66.1% R= 66.1% F1= 66.1%

Reproduction of the system's result

  1. Quick: Using the embeddings (say "eLSA01" for senseval2) in the folder, you can run disambiguation.py to reproduce the exact reported results. The code itself can evalute the results and also output a file named 'raw.KWSD.key' which can still be evaluated with the above method.
  2. Slow: If you want to reproduce the results starting from the domain knowledge document retrieval, it might take a few hours. You also need to download a few documents including British National Corpus(BNC)[3] and Wikipedia dump for document retriever in [4]. The details will be given in the following section.

Reproduce results from scratch

  1. Prepare the 'document retriever' in [4]. Also, you need to download the TF-IDF model and Wikipedia database on that website for a quick implementation. We use the model for document name retrieval in docname_retrieval.py and use the database to retrieve the corresponding documents in doc_retrieve.py. query_access.py is to access the query for document retrieval.

  2. The retrieved documents are combined with BNC documents which are pre-processed with bnc_process.py.The combined document set is then used to learn word representations via lsa in gensim_lsa.py.

  3. Run disambiguation.py for disambiguation of each dataset with the following settings.

    python disambiguation.py -l True -d domain_doc_name

[1] Raganato A.; Camacho-Collados J.; and Navigli R. 2017. Word Sense Disambiguation: A Unified Evaluation Framework and Empirical Comparison. In Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics, 99-110, Valencia, Spain: Association for Computational Linguistics.
[2] Agirre E.; de Lacalle O. L.; and Soroa A. 2018. The risk of sub-optimal use of Open Source NLP Software: UKB is inadvertently state-of-the-art in knowledge-based WSD. In Proceedings of Workshop for NLP Open Source Software, 29–33, Melbourne, Australia: Association for Computational Linguistics.
[3] The British National Corpus, version 3 (BNC XML Edition). 2007. Distributed by Bodleian Libraries, University of Oxford, on behalf of the BNC Consortium. URL: http://www.natcorp.ox.ac.uk/
[4] Chen D.; Fisch A.; Weston J.; and Bordes A. 2017. Reading Wikipedia to Answer Open-Domain Questions, In Proceedings of the 55th Annual Meeting of the Association for Computational Linguistics, 1870-1879, Vancouver, Canada: Association for Computational Linguistics.# Knowledge-based-WSD

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