In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Q: Context: The foreword of the book was written by Grafton Elliot Smith. Link Information: none Question: How long did Grafton Elliot Smith know Donald Alexander Mackenzie at the time he wrote the foreword of Ancient Man in Britain?

A: Answer: none
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Q: Context: demoted back to private in 1910 Link Information: none Question: How many people lived in India the year Roebuck was demoted back to private?

A: Answer: none
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Q: Context: John Milne Jnr., whose aeroplane went missing whilst flying over the Irish sea in 1937. Link Information: John Milne Jnr., whose aeroplane went missing whilst flying over the Irish sea in 1937.  Question: How old was Thomas Andrews the year that John Milne's aeroplane went missing?

A:
Answer: 64
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