A Survey: Complex Knowledge Base Question Answering

Knowledge base question answering(KBQA) is a technique that utilizes the rich semantic information in the knowledge base and fully understands the question to obtain the answer. At present, scholars put more energy into solving complex relationship problems. This paper first outlines the background and core challenges of complex KBQA. Second, two mainstream complex KBQA methods are introduced, namely, semantic parsing (SP-based) and information retrieval (IR-based) methods. Finally, future research trends are analyzed.