Context analysis device and context analysis method
A technology for parsing devices and contexts, applied in semantic analysis, special data processing applications, instruments, etc., can solve the problems of lack of correctness of procedural knowledge and insufficient accuracy of event sequences
Active Publication Date: 2016-10-05
KK TOSHIBA +1
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[0004] However, the event sequence obtained by the conventional method lacks the correctness as procedural knowledge, so context analysis using it may not be able to obtain sufficient accuracy, and improvement is required.
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[0027] Hereinafter, the context analysis device and the context analysis method of the embodiment will be described with reference to the drawings. The embodiment shown below is an application example to a device that performs context analysis, particularly anaphora analysis.
[0028] The phenomenon that a certain language expression indicates the same content or entity as the preceding expression in the document is called anaphora. In order to express the anaphoric relationship, instead of repeating the same word, pronouns are used or subsequent words are omitted. The former is called pronoun anaphora, and the latter is called zero anaphora. The processing of inferring the object indicated by the pronoun through the pronoun anaphora or supplementing the noun phrase (zero pronoun) omitted by the zero anaphora is anaphora analysis. In anaphora, anaphores such as pronouns or zero pronouns indicate intra-sentence anaphors that indicate objects in the same sentence, and inter-sente...
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The context analysis device (100) of the embodiment includes a case generator (3) for machine learning and an anaphora analysis predictor (5). A case generator (3) for machine learning includes a prediction sequence generation unit (32) and a probability prediction unit (33). A prediction sequence generation unit (32) generates from the document to be analyzed (D6) by using a combination of a predicate having a common item, semantic identification information specifying the semantics of the predicate, and case type information indicating a case type of the above shared item as elements. A prediction sequence is used to obtain a part of elements in a sequence in which a plurality of the elements are arranged by prediction. A probability prediction unit (33) predicts the occurrence probability of the predicted sequence based on the appearance probability of the sequence that matches the predicted sequence obtained in advance from an arbitrary document group (D1). The anaphoric analysis predictor (5) performs context analysis on the analysis target document (D6) using the predicted occurrence probability of the prediction sequence.
Description
Technical field [0001] The present invention relates to a context analysis device and a context analysis method for performing context analysis. Background technique [0002] Contextual analysis, such as Anaphora Resolution, Coreference Resolution, and Dialog Processing, is an important task in the correct understanding of documents in natural language processing. In context analysis, it is known that the use of procedural knowledge such as the script of Schank or the frame of Fillmore is effective. However, there is a limit to coverage in terms of procedural knowledge produced by humans. Therefore, try an approach to automatically obtain such procedural knowledge from the document. [0003] For example, a method has been proposed in which a sequence of interrelated predicates (hereinafter referred to as "event sequence") is regarded as procedural knowledge, and such an event sequence is obtained from an arbitrary document group and used as procedural knowledge. [0004] However, ...
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IPC IPC(8): G06F17/27
CPCG06F40/216G06F40/30G06F40/40
Inventor 浜田伸一郎
Owner KK TOSHIBA