input question: M: Bread, eggs and milk. What was said before this conversation????
output answer: F: What's for breakfast, Dad?

input question: M: That's John Bush. He's a Canadian. What was said before this conversation????
output answer: W: Who's that man? Do you know?

input question: M: Good morning. I bought this air conditioner here a few months ago. It doesn't work now. Can I return it or get it fixed? What was said before this conversation????
output answer: W: Hi, what can I do for you today, sir?

input question: W: Sorry, but mum asked me to go shopping with her. What was said before this conversation????
output answer:
M: Mary, would you like to have a picnic with us tomorrow?