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- W4226088891 abstract "Diverse Natural Language Processing tasks employ constituency parsing to understand the syntactic structure of a sentence according to a phrase structure grammar. Many state-of-the-art constituency parsers are proposed, but they may provide different results for the same sentences, especially for corpora outside their training domains. This paper adopts the truth discovery idea to aggregate constituency parse trees from different parsers by estimating their reliability in the absence of ground truth. Our goal is to consistently obtain high-quality aggregated constituency parse trees. We formulate the constituency parse tree aggregation problem in two steps, structure aggregation and constituent label aggregation. Specifically, we propose the first truth discovery solution for tree structures by minimizing the weighted sum of Robinson-Foulds (RF) distances, a classic symmetric distance metric between two trees. Extensive experiments are conducted on benchmark datasets in different languages and domains. The experimental results show that our method, CPTAM, outperforms the state-of-the-art aggregation baselines. We also demonstrate that the weights estimated by CPTAM can adequately evaluate constituency parsers in the absence of ground truth.MSC codesConstituency parse treeTruth discoveryOptimization" @default.
- W4226088891 created "2022-05-05" @default.
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- W4226088891 date "2022-01-01" @default.
- W4226088891 modified "2023-09-27" @default.
- W4226088891 title "CPTAM: Constituency Parse Tree Aggregation Method" @default.
- W4226088891 doi "https://doi.org/10.1137/1.9781611977172.71" @default.
- W4226088891 hasPublicationYear "2022" @default.
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