| 摘要 |
PROBLEM TO BE SOLVED: To properly present useful information to a user.SOLUTION: A retrieval control device includes an extraction unit for extracting a word included in input first information, and a control unit that causes retrieval means to retrieve second information output as a retrieval result on the basis of retrieval conditions based on the word extracted by the extraction unit. The control unit has a first retrieval mode for widening retrieval conditions and a second retrieval mode for narrowing the retrieval conditions. |
