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• W4288045133 endingPage "100737" @default.
• W4288045133 startingPage "100737" @default.
• W4288045133 abstract "Aggregate question answering essentially returns answers for given questions by obtaining query graphs with unique dependencies between values and corresponding objects. Word order dependency, as the key to uniquely identify dependency of the query graph, reflects the dependencies between the words in the question. However, due to the semantic gap caused by the expression difference between questions encoded with word vectors and query graphs represented with logical formal elements, it is not trivial to match the correct query graph for the question. Most existing approaches design more expressive query graphs for complex questions and rank them just by directly calculating their similarities, ignoring the semantic gap between them. In this paper, we propose a novel Structure-sensitive Semantic Matching(SSM) approach that learns aligned representations of dependencies in questions and query graphs to eliminate their gap. First, we propose a cross-structure matching module to bridge the gap between two modalities(i.e., textual question and query graph). Then, we propose an entropy-based gated AQG filter to remove the structural noise caused by the uncertainty of dependencies. Finally, we present a two-channel query graph representation that fuses the semantics of abstract structure and grounding content of the query graph explicitly. Experimental results show that SSM could learn aligned representations of questions and query graphs to eliminate the gaps between their dependencies, and improves up to 12% (F1 score) on aggregation questions of two benchmark datasets." @default.
• W4288045133 created "2022-07-27" @default.
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• W4288045133 date "2022-10-01" @default.
• W4288045133 modified "2023-09-28" @default.
• W4288045133 title "Structure-sensitive semantic matching for aggregate question answering over knowledge base" @default.
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• W4288045133 doi "https://doi.org/10.1016/j.websem.2022.100737" @default.
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