Papers › DREAM: Improving Situational QA by First Elaborating the Situation

DREAM: Improving Situational QA by First Elaborating the Situation

16 Dec 2021NAACL 2022 7arXiv:2112.08656archive 2025-07-28

Yuling Gu, Bhavana Dalvi Mishra, Peter Clark

When people answer questions about a specific situation, e.g., "I cheated on my mid-term exam last week. Was that wrong?", cognitive science suggests that they form a mental picture of that situation before answering. While we do not know how language models (LMs) answer such questions, we conjecture that they may answer more accurately if they are also provided with additional details about the question situation, elaborating the "scene". To test this conjecture, we train a new model, DREAM, to answer questions that elaborate the scenes that situated questions are about, and then provide those elaborations as additional context to a question-answering (QA) model. We find that DREAM is able to create better scene elaborations (more accurate, useful, and consistent) than a representative state-of-the-art, zero-shot model (Macaw). We also find that using the scene elaborations as additional context improves the answer accuracy of a downstream QA system, including beyond that obtainable by simply further finetuning the QA system on DREAM's training data. These results suggest that adding focused elaborations about a situation can improve a system's reasoning about it, and may serve as an effective way of injecting new scenario based knowledge into QA models. Finally, our approach is dataset-neutral; we observe improved QA performance across different models, with even bigger gains on models with fewer parameters. We make our dataset and model publicly available at https://github.com/allenai/dream.

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3ran · our draft was wrong

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get_nominative_pronoun allenai/dream/data/compile_scene_elaboration_dataset.py official repository ran · our draft was wrong fingerprinted Apache-2.0 (permissive) · 6a4a62441960a0d9 · report
get_possessive_form allenai/dream/data/compile_scene_elaboration_dataset.py official repository ran · our draft was wrong fingerprinted Apache-2.0 (permissive) · fbf71434cdfafb21 · report
get_possessive_form_from_nom allenai/dream/data/compile_scene_elaboration_dataset.py official repository ran · our draft was wrong fingerprinted Apache-2.0 (permissive) · dbcd627fd2cc1619 · report

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AdafactorAttentionAttention DropoutBPEDense ConnectionsDropoutGated Linear UnitInverse Square Root ScheduleLayer NormalizationLinear LayerMacawMulti-Head AttentionResidual ConnectionSentencePieceSoftmaxT5

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