# Predicate constraints based question answering over knowledge graph

> Research article (Information Processing & Management, 2019) · cited 42× · AI/ML

**Wikidata**: [openalex:W2912860574](https://www.wikidata.org/wiki/openalex:W2912860574)  
**Source**: https://4ort.xyz/entity/predicate-constraints-based-question-answering-over-knowledge-graph