Method and system for automatically extracting event evolution relationship based on news
A technology of event evolution relationship and automatic extraction, applied in unstructured text data retrieval, text database query, instruments, etc.
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[0245] Such as figure 1 As shown, a general flowchart of a method for automatically extracting news-based event evolution relations, the news-based automatic extraction method for event evolution relations includes the following steps:
[0246] News information preprocessing: Segment the input news, perform part-of-speech tagging and remove stop words, and extract the feature words in the comments to establish the structured data of the news;
[0247] News lead extraction: A news lead is a sentence that expresses the central idea of the news in a few sentences at the beginning of the news. Extracting news leads is used to extract news time and event keywords of news documents. The invention proposes a method for extracting news leads;
[0248]Time extraction of news events: News has obvious timeliness, and each event news has a definite time point or time period of occurrence. Extracting the time of news plays an important guiding role in the analysis of news evolution. ...
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