TASK DEFINITION: In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.
PROBLEM: When is harry potter and cursed child coming out?

SOLUTION: When is harry potter and cursed child preview at Palace Theatre, London coming out?

PROBLEM: Who was the man who escaped from alcatraz?

SOLUTION: Who were the man who escaped from alcatraz in June 1962 and are presumed dead?

PROBLEM: What process is used to separate salt from sea water in australian desalination plants?

SOLUTION:
What process using a partially permeable membrane is used to separate salt from sea water in australian desalination plants?