| 摘要 |
PROBLEM TO BE SOLVED: To specify a document in which a future is predicted, and extract the same.SOLUTION: A search device 100 comprises a structure analysis part 152 and an extraction part 153. The structure analysis part 152 executes structure analysis or semantic analysis to a text document. The extraction part 153 determines whether or not the result of the structure analysis or semantic analysis of the text document matches a first condition in which a first word phrase is a word phrase of a sentence end expression, a second condition in which a dependency relationship between first and second word phrases is a subjective case or arcs of the first and second word phrases are connected with an operation master or an object, and a third condition in which the first word phrase is not negative, and the text document matching the first, second, and third conditions is extracted as a future prediction document.SELECTED DRAWING: Figure 1 |
