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: It's party time, @katyperry! With 90 million on the guest list, we're gonna need a really big dance floor. ❤️ Twitter (@twitter) July 1, 2016 Answer: 90 million
how long is the guest list?

Context: "Are we getting pizza or what? I don't mean to change the subject but are we?" -guy #roofbreakup— Kyle Ayers (@kyleayers) November 17, 2013 Answer: pizza.
what food might be ordered?

Context: Star Wars: The Force Awakens has completed principal photography. #StarWarsVII #TheForceAwakens — Star Wars (@starwars) November 6, 2014 Answer: principal

what type of photography has been completed?