On the LongEval 2025 French Qwant dataset, BM25 plus a cross-encoder reranker beats variants with Gemini query expansion, with the best system averaging 0.296 NDCG@10.
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DS@GT at LongEval: Evaluating Temporal Performance in Web Search Systems and Topics with Two-Stage Retrieval
On the LongEval 2025 French Qwant dataset, BM25 plus a cross-encoder reranker beats variants with Gemini query expansion, with the best system averaging 0.296 NDCG@10.