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: Stevens grew up in Sydney Link Information: n 1788, the First Fleet of convicts, led by Arthur Phillip, founded Sydney as a British penal colony, the first European settlement in Australia. Answer: 1788
answer:
How old is the city where Stevens grew up?


question:
Context: After she starred in the Broadway production of Bloomer Girl, 20th Century Fox signed Holm to a movie contract in 1946. Link Information: formed from the merger of the Fox Film Corporation and Twentieth Century Pictures in 1935. Answer: 11
answer:

How long had 20th Centuy Fox been established when they signed Holm to a movie contract?