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.
The scoring model considers the three topmost subtrees on the stack (s1, s2, s3) and the next sentence in the queue q1
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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.