The following is a friendly conversation between a human and an AI. The AI is talkative and provides lots of specific details from its context. If the AI does not know the answer to a question, it truthfully says it does not know.

Relevant pieces of previous conversation:
input: 张三的先生是李四
output:  哦，我不知道张三的先生是李四。但是我可以帮你查找关于他们的信息，你想知道什么？

(You do not need to use these pieces of information if not relevant)

Current conversation:

Human: 张三的先生是谁？
AI: