In this task, you are given a context tweet and an answer. Your job is to generate a question for the given answer based on the given tweet paragraph. Note that your question should be answerable based on the given tweet, and the answer to your question should be the given answer.
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Question: Context: @mathewi @digiphile clearly humor, not fabrication. It's OK if it made u laugh, over the line if it didn't, that's the problem with humor! Jonah Peretti (@peretti) November 16, 2012 Answer: a joke

Answer: what did jonah peretti say to make people laugh?

Question: Context: The #KayoolaSolarBus has just arrived at Kampala Serena ahead of its launch on Tuesday. Kiira Motors (@KiiraMotors) February 14, 2016 Answer: ahead of its launch on tuesday

Answer: when did the bus arrive?

Question: Context: I just watched 2 @delta employees refuse to allow a nursing mother to bring her breast pump onboard because it was an additional carry-on. Peggy Flanagan (@peggyflanagan) January 20, 2015 Answer: it was additional carry-on

Answer:
what reason did the delta employees give, for not allowing a breast pump onboard?