{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/neural-bi-lexicalized-pcfg-induction","title":"Neural Bi-Lexicalized PCFG Induction","arxiv_id":"2105.15021","date":"2021-05-31","proceeding":"ACL 2021 5","authors":["Songlin Yang","Yanpeng Zhao","Kewei Tu"],"abstract":"Neural lexicalized PCFGs (L-PCFGs) have been shown effective in grammar induction. However, to reduce computational complexity, they make a strong independence assumption on the generation of the child word and thus bilexical dependencies are ignored. In this paper, we propose an approach to parameterize L-PCFGs without making implausible independence assumptions. Our approach directly models bilexical dependencies and meanwhile reduces both learning and representation complexities of L-PCFGs. Experimental results on the English WSJ dataset confirm the effectiveness of our approach in improving both running speed and unsupervised parsing performance.","url_abs":"https://arxiv.org/abs/2105.15021v1","url_pdf":"https://arxiv.org/pdf/2105.15021v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"abstracts"},"code_links":[{"paper_slug":"neural-bi-lexicalized-pcfg-induction","repo_url":"https://github.com/sustcsonglin/TN-PCFG","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"pytorch","reach":{"status":"ok"}}],"tasks":[{"task_slug":"constituency-grammar-induction","task_name":"Constituency Grammar Induction"}],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[{"leaderboard":"/sota/constituency-grammar-induction-on-ptb","task":"Constituency Grammar Induction","dataset":"PTB Diagnostic ECG Database","model":"NBL-PCFG","rank_in_archive_order":10,"of":24,"metrics":{"Mean F1 (WSJ)":"60.4"},"uses_additional_data":false}],"syntology":{"syntology_url":"https://syntology.ai/paper/2105.15021","atlas_url":"https://app.syntology.ai/?focus=2105.15021","mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}