A hierarchical QA framework converts RST discourse trees into enhanced sentence representations for structure-guided retrieval and reports consistent gains over baselines on four datasets across genres and languages.
Phase 2: Document-level Tree Construction
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Beyond Chunking: Discourse-Aware Hierarchical Retrieval for Long Document Question Answering
A hierarchical QA framework converts RST discourse trees into enhanced sentence representations for structure-guided retrieval and reports consistent gains over baselines on four datasets across genres and languages.