[Q]: F: No, I'm going to the playground. Can you come with me, Tom? What was said before this conversation?
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[A]: M: Hello, Mary. Are you going to the library?

[Q]: M: We would like to. Who else will be there? W: Well, I also invite the White's. M: That sounds great. I enjoy making friends, chatting with others. I always stay at home and feel bored. By the way, is it a formal dinner or informal one? W: Informal, of course, just feel at home. M: Great! Oh, I can't wait. What was said before this conversation?
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[A]: W: Jack, would you like to come to my house with your wife for dinner at six tomorrow evening?

[Q]: M: The reporter says it's going to rain. What was said before this conversation?
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[A]: F: What's the weather like tomorrow?

[Q]: M: OK. We have a large selection of small desks for young children. What was said before this conversation?
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[A]:
W: Excuse me. I'd like to buy a desk for my little son. I don't have any particular brand in mind, but it should be less than 50 dollars.