Trigger word determination method and device

Abstract

The invention discloses a trigger word determination method, which comprises the following steps of identifying a target entity pair in a target text sentence, the target entity pair comprising a first entity and a second entity; if the distance between the first entity and the second entity is greater than or equal to a preset threshold value, or if the distance between the first entity and the second entity is less than the preset threshold value and the first entity and the second entity do not contain mesons, constructing a dependency relationship structure diagram of the target text sentence; determining the association rules of the corresponding nodes in the dependency relationship structure diagram; calculating a target comprehensive importance score of each node relative to the target entity pair according to the corresponding association rules; and determining a trigger word in the target text sentence according to the target comprehensive importance score. According to the method, in the determination process of the trigger word, dependence on a dictionary is not needed, the limitation of the application field is avoided, and the transportability is strong.

Description

technical field [0001] The present invention relates to the technical field of knowledge graphs, in particular to a method and device for determining trigger words. Background technique [0002] In order to make search engines more intelligent and network information more structured, Google proposed the concept of knowledge graphs in 2012. The knowledge map is essentially a semantic network composed of entities and the relationships between entities. It is impossible to manually extract entities and entity relationships. Therefore, in the process of building a knowledge map, an important step is information extraction technology. Correctly extracting entity-relationship trigger words is helpful to the judgment of subsequent relationship categories, helps to guide entity-relationship extraction, and improves extraction performance. [0003] The existing trigger word discovery method is a dictionary-based trigger word discovery method. This method uses the semantic word or se...

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Problems solved by technology

[0005] In view of this, the present invention provides a trigger word determination method and device to solve the problem that the dictionary-based trigger word discovery method in the prior art is simple to operate and does not require complicated learning and extraction processes, but the constructed dictionary is domain-specific. Strong, the effect of the dictionary-based relation extraction method depends on the quality of the dictionary, and the problem of poor portability

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