Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: How many years after his father flew Spitfires was Brown born? Passage:Brown was born on 15 April 1948, in Tangier, Morocco. His father flew Spitfires during World War II and joined civil aviation in the post war period, flying for Gibraltar Airways and British European Airways. He was educated at Merchant Taylors' School, an all-boys public school in Hertfordshire. He then matriculated into St Catherine's College, Oxford to study history. In 1966, he graduated from the University of Oxford with a Bachelor of Arts (BA) degree in Modern History. This was later promoted to Master of Arts (MA Oxon) as per tradition. He remained at St Catherine's to complete a Diploma in Art History. He then undertook post-graduate research at the Courtauld Institute of Art and completed his Doctor of Philosophy (PhD) degree.


a