Given the task definition and input, reply with output. 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: Barry Goldwater's 1964 presidential campaign Link Information: John James Duncan Sr. (March 24, 1919 June 21, 1988) Question: How old was Jimmy Duncan's father when Goldwater ran for president?
Answer: 45