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'.
Q: Context: In March 1915 he joined Aston Villa Link Information: none Question: How big was the Royal Air Force the year York joined Aston Villa?
A: 
Answer: none