Q: 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.
Context: Key messages from NHC for Tropical Storm Hermine issued 5a.m. EDT Fri. @NHCDirector #Hermine NHC Atlantic Ops (@NHC_Atlantic) September 2, 2016 Answer: key
A:
what type of messages are issued?