# On Topic Difficulty in IR Evaluation

> Research article (Proceedings of the 42nd International ACM SIGIR Conference on Research and Development in Information Retrieval, 2019) · cited 10× · AI/ML

**Wikidata**: [openalex:W2963196014](https://www.wikidata.org/wiki/openalex:W2963196014)  
**Source**: https://4ort.xyz/entity/on-topic-difficulty-in-ir-evaluation