instruction:
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.
question:
Context: His doctoral thesis under the supervision of Charles Tart was on the phenomenology of deep states of hypnosis. He subsequently went on to do post-doctoral work in the area of dissociation and hypnosis at Stanford University under David Spiegel. Link Information: none Answer: none
answer:
Which doctorate and post doctorate supervisor's that Cardena worked under was older?


question:
Context: the Rangers traded Gray, Mike Bucci, and Larry McCall to the Cleveland Indians for David Clyde and Jim Norris. Link Information: none Answer: none
answer:
Which of the players that Gray was traded to the Indians for had a longer career with the Rangers?


question:
Context: Until May 1942 Germans used Sajmište concentration camp to mostly kill off Jews from Belgrade and other parts of Serbia Link Information: The Sajmište concentration camp () was a Nazi concentration and extermination camp during World War II. It was located at the former Belgrade fairground site near the town of Zemun Answer: Zemun
answer:

Which town was near the camp that, until May 1942, the Germans used it to mostly kill off Jews from Belgrade and other parts of Serbia?