# Joint entity recognition and relation extraction as a multi-head selection problem

> Research article (Expert Systems with Applications, 2018) · cited 445× · AI/ML

**Wikidata**: [openalex:W2799125718](https://www.wikidata.org/wiki/openalex:W2799125718)  
**Source**: https://4ort.xyz/entity/joint-entity-recognition-and-relation-extraction-as-a-multi-head-selection-problem