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: We regret the mistaken RTs from our account yesterday and look forward to continuing to share the beauty and history of our parks with you NationalParkService (@NatlParkService) January 21, 2017 Answer: rt's
what was mistaken in the account yesterday?

Context: Yellowstone River closed to ALL recreation in response to ongoing fish kill: Montana FWP (@MontanaFWP) August 19, 2016 Answer: yellowstone river
what river was closed?

Context: Obama: "ISIL is not Islamic" -- POTUS opens a section aimed at motivating Muslims around the world to disown ISIL/aid US fight.— Lisa Lerer (@llerer) September 11, 2014 Answer: muslims

who was obama trying to encourage to openly reject isil?