Teacher:Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Teacher: Now, understand the problem? Solve this instance: Context : Sir Barrie Heath, DFC, AE (11 September 1916 -- 22 February 1988) was a World War II Royal Air Force Spitfire pilot who fought in the Battle of Britain, and was awarded the Distinguished Flying Cross.
Answer : Royal Air Force
Student:
What military branch is Barrie Heath?