Given the task definition and input, reply with output. 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: Reaching Mach 4, #LDSD's SIAD deployed & inflated. Chute deployed, but did not inflate. We'll study data from this test to learn & improve. NASA Technology (@NASA_Technology) June 8, 2015 Answer: siad.
what took off but didn't inflate?