Q: 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: Brown was born on 15 April 1948, in Tangier, Morocco. His father flew Spitfires during World War II Link Information: none Question: How many years after his father flew Spitfires was Brown born?
A:
Answer: none