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: Calvin Coolidge (born John Calvin Coolidge Jr.; ; July 4, 1872 Link Information: Warren Gamaliel Harding (November 2, 1865 August 2, 1923) Question: How old was Warren Harding the year Coolidge was born?
Answer: 7