Information retrieval system

Abstract

To obtain an information retrieval system which replies according to reliability of answers of a large-scale language model to a user's question.SOLUTION: A context information retrieval unit 22 searches a document database 13a by using a feature vector of a question and acquires a text which has a similarity degree to the feature vector satisfying a predetermined condition as context information. A first prompt generation unit 23 generates a first prompt including the question and the context information. An answer acquisition unit 24 acquires an answer corresponding to the first prompt as a first answer by using a large-scale language model 4a. A second prompt generation unit 25 generates a second prompt which includes the context information and the first answer and with which reliability of the first answer is obtained as an answer. An answer verification unit 26 acquires an answer corresponding to the second prompt as a second answer by using the large-scale language model 4a and identifies the reliability of the first answer by using the second answer.SELECTED DRAWING: Figure 1

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