Method and apparatus for generating temporal knowledge graph, device, and medium

An electronic device, comprising:

• at least one processor;
• and
• a storage,
• wherein the storage stores at least one instruction that, when executed by the at least one processor, causes the at least one processor to perform operations, the operations comprising:
• acquiring a corpus including time information from a source including a web page;
• performing multivariate data extraction on the corpus to obtain multivariate data, the multivariate data including an entity pair, an entity relationship and a target time interval of the entity relationship, the target time interval being used to indicate a valid period of the entity relationship;
• and
• generating a temporal knowledge graph based on the entity pair, the entity relationship and the target time interval of the entity relationship,
• wherein extracting the target time interval of the entity relationship comprises:
• obtaining a plurality of time intervals of the entity relationship through the multivariate data extraction;
• and
• performing fusion on the plurality of time intervals to obtain the target time interval, and
• wherein after the target time interval is obtained by performing fusion on the plurality of time intervals, the operations further comprise:
• determining whether a null value exists at a time starting point and a time end point of the target time interval;
• in response to determining that the null value exists at the time starting point and the time end point of the target time interval, determining a validity of the null value using a candidate corpus from a source different from a source of the corpus;
• and
• in response to determining that the null value is invalid, replacing the null value with a time recognized from the candidate corpus.

A non-transitory computer readable storage medium, storing at least one computer instruction that, when executed by a processor, causes the processor to perform operations, the operations comprising:

• acquiring a corpus including time information from a source including a web page;
• performing multivariate data extraction on the corpus to obtain multivariate data, the multivariate data including an entity pair, an entity relationship and a target time interval of the entity relationship, the target time interval being used to indicate a valid period of the entity relationship;
• and
• generating a temporal knowledge graph based on the entity pair, the entity relationship and the target time interval of the entity relationship,
• wherein extracting the target time interval of the entity relationship comprises:
• obtaining a plurality of time intervals of the entity relationship through the multivariate data extraction;
• and
• performing fusion on the plurality of time intervals to obtain the target time interval, and
• wherein after the target time interval is obtained by performing fusion on the plurality of time intervals, the operations further comprise:
• determining whether a null value exists at a time starting point and a time end point of the target time interval;
• in response to determining that the null value exists at the time starting point and the time end point of the target time interval, determining a validity of the null value using a candidate corpus from a source different from a source of the corpus;
• and
• in response to determining that the null value is invalid, replacing the null value with a time recognized from the candidate corpus.