公开(公告)号：US09785686B2

公开(公告)日：2017-10-10

申请号：US14616537

申请日：2015-02-06

Applicant: GOOGLE INC.

Inventor： Shubin Zhao ,  Krzysztof Czuba

IPC: G06F17/30 ,  G06N5/04

CPC classification number: G06F17/30554 ,  G06F17/30011 ,  G06F17/30371 ,  G06F17/30395 ,  G06F17/30528 ,  G06F17/30684 ,  G06F17/30867 ,  G06N5/041

Abstract: A query is defined that has an answer formed of terms from electronic documents. A repository having facts is examined to identify attributes corresponding to terms in the query. The electronic documents are examined to find other terms that commonly appear near the query terms. Hypothetical facts representing possible answers to the query are created based on the information identified in the fact repository and the commonly-appearing terms. These hypothetical facts are corroborated using the electronic documents to determine how many documents support each fact. Additionally, contextual clues in the documents are examined to determine whether the hypothetical facts can be expanded to include additional terms. A hypothetical fact that is supported by at least a certain number of documents, and is not contained within another fact with at least the same level of support, is presented as likely correct.