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: What is the largest coin in the us?

SOLUTION: What is the largest coin ever minted in the us? 
 gold "Half Union" pattern in 1877

PROBLEM: Who was in charge of russia during the cold war?

SOLUTION:
Who was in charge of Russia at the beginning of the Cold War? 
 Joseph Stalin