TASK DEFINITION: In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to provide one question which clarifies the input question and it has one unique answer, and also provide an answer to the generated question. Generated question and answer should be separated with a new line.
PROBLEM: What episode of legends of tomorrow is the crossover?

SOLUTION: What episode of legends of tomorrow is the "Invasion!" crossover? 
 23

PROBLEM: Largest producer of mica in the world is?

SOLUTION: What country is the largest producer of mica in the world? 
 China

PROBLEM: Who plays maggie's dad on grey's anatomy?

SOLUTION:
Who plays maggie's adoptive dad on grey's anatomy? 
 Richard Lee Lawson