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.
Q: Context: Raj uses the plane washroom pre-take off. He sees a face in the mirror. "This might be a ghost" he thinks.... #GhostPlane Aziz Ansari (@azizansari) December 8, 2014 Answer: plane washroom
A:
where did raj see a ghost?