Figure 1: 
Recall@1 for retrieving passage containing a query from three million candidates. The figure compares a fine-tuned bert-based dual encoder (de-bert-768), an off-the-shelf bert-based encoder with average pooling (bert-init), and sparse term-based retrieval (bm25), while binning passages by length.

Recall@1 for retrieving passage containing a query from three million candidates. The figure compares a fine-tuned bert-based dual encoder (de-bert-768), an off-the-shelf bert-based encoder with average pooling (bert-init), and sparse term-based retrieval (bm25), while binning passages by length.

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