# Cluster-Former: Clustering-based Sparse Transformer for Question Answering

> Research article (Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021, 2021) · cited 20× · AI/ML

**Wikidata**: [openalex:W3125498921](https://www.wikidata.org/wiki/openalex:W3125498921)  
**Source**: https://4ort.xyz/entity/cluster-former-clustering-based-sparse-transformer-for-question-answering