TASK DEFINITION: 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.
PROBLEM: Context: He is one of the six main people featured in the documentary film Meet the Mormons released October 10, 2014 Link Information: Meet the Mormons is a 2014 American documentary film directed by Blair Treu  Answer: Blair Treu

SOLUTION: Who directed the documentary Ken was featured in?

PROBLEM: 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

SOLUTION: How many days did Operation Barbarossa last?

PROBLEM: Context: their 1995 album Abstract Principles Taken to Their Logical Extremes was praised by extreme music magazine Terrorizer, Link Information: Terrorizer published its first issue in October 1993 Answer: 2

SOLUTION:
How many years after Terrorizer was founded did it praise Dark Heresy's 1995 album?