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 posted a 100-yard return of a kickoff for a touchdown against Texas Tech. Link Information: They are a member of the Big 12 Conference. Answer:  Big 12 Conference
[A]: What conference is the team who Lockett scored a 100-yard return touchdown against a member of?


[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: the Gun-Free Schools Act which the U.S. Supreme Court overturned in 1995 Link Information: none Answer: none
[A]:
Who was the last person to retire from the US Supreme Court prior to its decision on the Gun-Free Schools act?