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Open Information Extraction (Open IE) enables the extraction of facts from large quantities of texts written in natural language. In this work, we propose an Open IE method to extract facts from texts written in Portuguese. We developed two new rules that generalize the inference by transitivity and by symmetry. Consequently, this approach increases the number of implicit facts in a sentence. Our novel symmetric inference approach is based on a list of symmetric features. Our results confirmed that our method outstands close works both in precision and number of valid extractions. Considering the number of minimal facts, our approach is equivalent to the most relevant methods in the literature.<\/jats:p>","DOI":"10.1017\/s135132491800044x","type":"journal-article","created":{"date-parts":[[2018,12,17]],"date-time":"2018-12-17T04:17:44Z","timestamp":1545020264000},"page":"287-306","source":"Crossref","is-referenced-by-count":7,"title":["InferPortOIE: A Portuguese Open Information Extraction system with inferences"],"prefix":"10.1017","volume":"25","author":[{"given":"Cleiton Fernando Lima","family":"Sena","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8586-1042","authenticated-orcid":false,"given":"Daniela Barreiro","family":"Claro","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2018,12,14]]},"reference":[{"key":"S135132491800044X_ref7","doi-asserted-by":"publisher","DOI":"10.1109\/TKDE.2006.152"},{"key":"S135132491800044X_ref12","first-page":"711","volume-title":"Multilingual Open Information Extraction","author":"Gamallo","year":"2015"},{"key":"S135132491800044X_ref9","doi-asserted-by":"publisher","DOI":"10.1145\/1409360.1409378"},{"key":"S135132491800044X_ref16","first-page":"523","volume-title":"Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning","author":"Mausam","year":"2012"},{"key":"S135132491800044X_ref1","first-page":"52","volume-title":"Proceedings of the Joint Workshop on Automatic Knowledge Base Construction and Web-scale Knowledge Extraction, AKBC-WEKEX \u201912","author":"Akbik","year":"2012"},{"key":"S135132491800044X_ref3","first-page":"28","volume-title":"The Tradeoffs Between Open and Traditional Relation Extraction","volume":"8","author":"Banko","year":"2008"},{"key":"S135132491800044X_ref21","first-page":"118","volume-title":"Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics, ACL \u201910","author":"Wu","year":"2010"},{"key":"S135132491800044X_ref19","first-page":"442","volume-title":"Proceedings of the 19th International Conference on Enterprise Information Systems\u2014ICEIS","volume":"1","author":"Sena","year":"2017"},{"key":"S135132491800044X_ref22","doi-asserted-by":"publisher","DOI":"10.1186\/s13173-015-0023-2"},{"key":"S135132491800044X_ref14","unstructured":"Godoy, L. (2008). Os verbos rec\u00edprocos no PB: interface sintaxe-sem\u00e2ntica lexical. 2008. 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PhD Thesis, University of S\u00e3o Paulo."},{"key":"S135132491800044X_ref8","first-page":"355","volume-title":"Proceedings of the 22nd International Conference on World Wide Web, WWW \u201913","author":"Del Corro","year":"2013"},{"key":"S135132491800044X_ref11","doi-asserted-by":"publisher","DOI":"10.3115\/v1\/N15-1151"},{"key":"S135132491800044X_ref10","first-page":"1535","volume-title":"Proceedings of the Conference on Empirical Methods in Natural Language Processing, EMNLP \u201911","author":"Fader","year":"2011"},{"key":"S135132491800044X_ref18","volume-title":"Gram\u00e1tica da L\u00edngua Portuguesa","author":"Neto","year":"2003"},{"key":"S135132491800044X_ref15","first-page":"4074","volume-title":"Proceedings of the Twenty-Fifth International Joint Conference on Artificial Intelligence, IJCAI\u201916","author":"Mausam","year":"2016"},{"key":"S135132491800044X_ref20","doi-asserted-by":"publisher","DOI":"10.1023\/A:1007562322031"},{"key":"S135132491800044X_ref2","volume-title":"Proceedings of the 20th International Joint Conference on Artifical Intelligence, IJCAI\u201907","author":"Banko","year":"2007"}],"container-title":["Natural Language Engineering"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S135132491800044X","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,4,11]],"date-time":"2019-04-11T20:37:10Z","timestamp":1555015030000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S135132491800044X\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,12,14]]},"references-count":22,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2019,3]]}},"alternative-id":["S135132491800044X"],"URL":"https:\/\/doi.org\/10.1017\/s135132491800044x","relation":{},"ISSN":["1351-3249","1469-8110"],"issn-type":[{"value":"1351-3249","type":"print"},{"value":"1469-8110","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,12,14]]}}}