Question: M: Yes, I know your feeling, dear! Even I myself don't know how I escaped it. I was the only lucky guy. What was said before this conversation?
Answer: W: Thank heavens! You're back safe and sound. Everyone was worried on hearing about the air crash. And I had so many sleepless nights!
[Q]: M: Yes, please. I'd like some oranges. W: Do you want Florida or California oranges? M: Which do you think are better? W: Florida oranges are sweet but they are small. But California oranges have no seeds. M: Then give me five California oranges. W: Anything else? M: I also want some bananas. How do you sell them? W: One dollar a pound. How many do you want? M: Give me four and see how much they are. W: They are just one pound. M: Good. How much do I owe you? W: Three dollars. M: Here you are. W: Thank you. What was said before this conversation?
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[A]: W: Can I help you?
input: Please answer the following: W: Yes. And that medicine hasn't helped. Not a good start to our vacation, I'm afraid. M: Do you have any idea what caused it? W: Well, I thought it might be last night's dinner. M: But I am fine. Could it be the heat? It's enough to make anyone ill. W: I know. But we've been here a week now. Anyway, I've been careful in the sun and I've been drinking bottled water. M: Then we'd better stay in the hotel today. What was said before this conversation?
++++++++++
output: M: Still feeling ill?
Please answer this: W: Ok, it's about 500 km farther than from Guangzhou to Shanghai. What was said before this conversation?
++++++++
Answer: M: It's about 2300 km by train from Guangzhou to Beijing.
Problem: W: They are sixty cents a pound. What was said before this conversation?

A: M: These oranges are nice. How much are they?
input: Please answer the following: W: Good idea. What should I take? M: Your camera, please. What was said before this conversation?
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output:
M: Shall we go to the park tomorrow?