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'.

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?
Answer: none

Context: he teamed with his brother in the Red Wings farm system before the two of them were traded to the Chicago Blackhawks for Doug McCaig in December 1945. Just over a month later, Chicago traded him to Boston for Bill Jennings Link Information: none Question: Which player played longer in the NHL, Doug McCaig or Bill Jennings?
Answer: none

Context: former National Geographic photographer Charles O'Rear was on his way from his home in St. Helena, California, Link Information: In 1971, National Geographic magazine hired O'Rear to document the lives of Russian villagers Question: How long did the photographer who lived in St. Helena California work for National Geographic?

Answer: 24