In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

[Q]: Context: He fought in Operation Barbarossa, the German invasion of the Soviet Union, and claimed his first aerial victory on 8 August 1941. Link Information: none Answer: none
[A]: How many days did Operation Barbarossa last?


[Q]: Context: before descending the Niagara Escarpment toward the village of Lewiston Link Information: Lewiston is a village in Niagara County, New York, United States. The population was 2,701 at the 2010 census.  Answer: 2,701 
[A]: What is the population of the village near the Niagara Escarpment?


[Q]: Context: He also got his own series of shorts on The Yogi Bear Show (renamed Yakky Doodle) Link Information: He appears in Little Quacker (1950) Answer: Little Quacker
[A]:
Which was created first, Little Quacker (1950) or The Yogi Bear Show?