Abstract: Provided are a question answering (QA) system and method based on a complex reasoning pipeline. The QA method includes classifying a reasoning type of an input question, generating sub-questions by decomposing the input question, inputting the sub-questions to a reasoning pipeline corresponding to the reasoning type, and outputting a final answer corresponding to the input sub-questions from the reasoning pipeline.

Abstract: The present disclosure relates to a question answering system and method capable of inferring multiple correct answers. The question answering system capable of inferring multiple correct answers according to the present disclosure includes an input interface device configured to receive a query, a memory for storing a program that analyzes the query and searches for a paragraph with a high probability of including a correct answer through a document search, and a processor for executing the program, wherein the processor extracts a correct answer using a result of the searching for a paragraph with a high probability of including a correct answer, determines whether the extracted correct answer corresponds to multiple correct answers, and provides a correct answer extraction result.