TASK DEFINITION: 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.
PROBLEM: Context : 45 Commando Royal Marines (pronounced ``four-five commando'') is a battalion sized unit of the British Royal Marines and subordinate unit within 3 Commando Brigade Royal Marines, the principal Commando formation, under the Operational Command of Commander in Chief Fleet. 
Answer : Royal Marines

SOLUTION: What military organization did 45 Commando belong to?

PROBLEM: Context : Maschenka (Russian: Машенька, Mashen'ka; English: Mary) is a 1987 British film adaptation of the debut novel by Vladimir Nabokov, first published under his pen name V. Sirin in 1926. 
Answer : Mary

SOLUTION: The Maschenka is based upon what?

PROBLEM: Context : NGC 4780 is an intermediate spiral galaxy within the constellation Virgo. 
Answer : Virgo

SOLUTION:
The star NGC 4780 is a part of the constellation named what?