DeFacto - A Multilingual Fact Validation Interface
R. Speck, D. Esteves, J. Lehmann, and A. Ngonga Ngomo. 14th International Semantic Web Conference (ISWC 2015), 11-15 October 2015, Bethlehem, Pennsylvania, USA (Semantic Web Challenge Proceedings)
, (2015)Semantic Web Challenge, International Semantic Web Conference 2015.
The curation of a knowledge base is a key task for ensuring the correctness and traceability of the knowledge provided in the said knowledge. This task is often carried out manually by human curators, who attempt to provide reliable facts and their respective sources in a three-step process: issuing appropriate keyword queries for the fact to check using standard search engines, retrieving potentially relevant documents and screening those documents for relevant content. However, this process is very time-consuming, mainly due to the human curators having to scrutinize the web pages retrieved by search engines. This demo paper demonstrate the RESTful implementation for DeFacto (Deep Fact Validation) – an approach able to validate facts in RDF by finding trustworthy sources for them on the Web. DeFacto aims to support the validation of facts by supplying the user with (1) relevant excerpts of web pages as well as (2) useful additional information including (3) a score for the confidence DeFacto has in the correctness of the input fact. To achieve this goal, DeFacto collects and combines evidence from web pages written in several languages. We also provide an extension for finding similar resources obtained from the Linked Data, using the sameas.org service as backend. In addition, DeFacto provides support for facts with a temporal scope, i.e., it can estimate the time frame within which a fact was valid.