Problem: Given the question: M: Good evening, and thank you for inviting me here this evening. What was said before this conversation?
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The answer is:
W: Well, Tonight we have Prof. Brown in the studio to talk about his recent book, Fashion Images. Good evening.

Problem: Given the question: M: Yes. Go along this road and turn right at the second crossing. What was said before this conversation?
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The answer is:
F: Excuse me, can you tell me the way to the cinema?

Problem: Given the question: M: He was supposed to arrive next week, but he is coming back the day after tomorrow. What was said before this conversation?
++++++++++++++++++++++++++++++++
The answer is:
W: Have you heard whether Jack is coming back today?