Problem: M: Hello, Victoria. This is Joe Smith from country holidays. I wondered if you could do some catering for us next week, we are having a small reception. It's to launch our summer holiday advertising campaign. Will you be free? W: When exactly is it? Mr. Smith? M: April 21st, that's Thursday. Oh, sorry, no. It should be Friday. W: Oh, yes I can do that where will you be holding it? M: We thought we'd have that at head office and use the conference room, because there is enough room for everyone there. W: Ok. What sort of things would you like? M: Just a light lunch I think, so that people can eat while they move around and talk to each other. You did some thing similar for us last year. We'd be happy to have the same menu again. W: Right. I'll look at my diary and see what you had last time. Oh, I nearly forgot to ask you how many should I cater for? M: Well, I think most people will be able to come, perhaps around 30. No, let's say 35, to be sure. W: Right, thank you for getting in touch, Mr. Smith. I'll send you confirmation of the arrangements by the end of this week. M: Ok. What was said before this conversation?

A: W: Hello, Happy Time Catering Services, Vitoria speaking. How can I help you?
Problem: Given the question: B: It didn't rain before I reached home. What was said before this conversation?
++++++++++++++++++++++++++++++++
The answer is:
A: When did it begin to rain?
input question: W: Yes? M: Could you tell me the way to People's Park? W: Yes. Go down this road. Turn right at the third crossing. Walk until you see a school. It's just opposite the school. M: It sounds like quite a distance. W: Yes, about half an hour's walk. M: Can I take a bus there? W: I'm afraid not. But you can take a taxi. M: That's a good idea. Thank you very much. W: It's my pleasure. What was said before this conversation????
output answer: M: Excuse me, please.
F: I found it under my bed. What was said before this conversation?
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Answer: M: Where did you find your book?
Q: W: That's some load. You've got your hand full already. What was said before this conversation?
A: M: Why did I even agree to work for the school newspaper while taking five classes?
[Q]: M: Yes. It explains how science will revolutionize the 21st century. W: Could I ask you some questions concerning the book? M: Sure. W: Are you optimistic about the future? M: Generally, yeah. If we go back to the year of 1900, most Americans didn't live beyond the age of 50. Since then, we've had improvements in health care and technology. There is no reason why these won't continue far into the 21st century. W: Are we ready for the changes that will come? M: Changes are already happening. The future is here now. We have DNA, microchips, the internet. Some people's reaction is to say, we are too old; we don't understand new technology. My reaction is to say, we must educate people to use new technology now. W: Is world population going to be a big problem? M: Yes, and no. I think that world population will stop increasing as we all get richer. If you are a part of the middle class, you don't want or need 12 children. W: Will there be a world government? M: Very probably. We will have to manage the world and its resources on a global level because countries alone are too small. W: Will we have control of everything? M: I think we'll learn to control the weather, volcanoes and earthquakes. Illness won't exist. We'll grow new livers, kidneys, hearts, and lungs like spare parts for a car. People will live to about 130 or 150. For 2000 years, we have tried to understand our environment. Now we'll begin to control it. What was said before this conversation?
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[A]:
W: Hi, Professor Smith. I hear you've written a book titled Visions.