Detailed Instructions: 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'.
Problem:Context: but was defeated by Republican Benjamin F. Bruce. Link Information: In 1863, he ran for re-election, but was this time was defeated again by Bruce Question: How many years did Benjamin F. Bruce hold the office of Canal Commissioner?
Solution:
Answer: 4