You will be given a definition of a task first, then some input of the task.
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: Thompson was twice an unsuccessful candidate for Governor of Wisconsin, losing to incumbent Oscar Rennebohm in 1948 and to Walter J. Kohler, Jr. in 1950 Link Information: Oscar Rennebohm (May 25, 1889 October 15, 1968) Question: How many years of age difference are there between the two candidates that Thompson lost to in 1948 and 1950?
Output:
Answer: 15