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: FitzOsbern had been granted the Lordship of Striguil by his second cousin King William in gratitude for his support in the Norman conquest of England Link Information: none Question: During what years did the Norman conquest of England occur?
Answer: none

Context: He joined 100 Squadron as a Lancaster pilot Link Information: The Avro Lancaster is a British four-engined Second World War heavy bomber. Question: Who was the manufacturer of the planes Thomas flew when he joined 100 Squadron?
Answer: Avro 

Context: In 1984 Louis de Branges proved the conjecture (for this reason, the Bieberbach conjecture is sometimes called de Branges' theorem). Link Information: 

Louis de Branges de Bourcia (born August 21, 1932) Question: How old was Louis de Branges when he proved the Bieberbach conjecture?

Answer: 52