This recently granted Google patent generally relates to generating query answers, and this patent also introduces the concept of Constraints to help answer queries. Using Constraints For Query Answers This patent asks questions about contents related to facts about entities that questions are getting added about. Documents about Using constraints for query answering are these: GRIP: Constraint-based Explanation of Missing Answers for Graph Queries Question Answering using Constraint Satisfaction: QA-by-Dossier-with-Constraints Interestingly the first document refers to the Google Knowlege Vault as a reference. Likely because it focuses on getting correct answers to questions by using constraints. Since this patent focuses so much on Semantic SEO.…