Provided are a lexical knowledge graph representation method of natural language text and an apparatus thereof. The following embodiments provide the lexical knowledge graph representation method of natural language text graphing syntax analysis and semantic analysis information and the apparatus thereof. The embodiments provide a technique for representing a natural language input sentence as a lexical knowledge graph in a form in which the entire original text is recoverable and a technique for converting the type of the lexical knowledge graph in accordance with the introduction of the syntax analysis information or the semantic analysis information.
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