Problem: M: Mr. Smith will not be back until Thursday night. You may come then. What was said before this conversation?

A: W: Good morning. I'm here to see Mr. Smith.
Problem: Given the question: M: Yes, because they are too far away. But some of them can be seen. What was said before this conversation?
++++++++++++++++++++++++++++++++
The answer is:
F: We can't see many stars.
input question: M: He wished to go to London and Paris, but he didn't have enough money, so he went to Beijing instead. What was said before this conversation????
output answer: W: Where did Tom spend his holiday?
W: Not really, actually. What was said before this conversation?
----
Answer: M: Sally, I guess you must have had a good time in Europe during your vacation.
Q: M: Yeah, it's just another one of this year's routine missions. The first mission was undertaken a decade ago and broadcast live then worldwide. What was said before this conversation?
A: W: The morning paper says the space shuttle is taking off at 10 a.m. tomorrow.
[Q]: W: Where did you get it? M: My uncle Robert sent it to me last week. What was said before this conversation?
****
[A]:
M: Hi, Alice. Look at my new camera.