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'.
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Question: Context: Serra made one CART Champ Car start in 1985 at the Portland International Raceway for Ensign Racing but suffered an engine failure. Link Information: Ensign entered Formula One in , with backing from pay driver, Rikky von Opel. Von Opel had driven for the team in Formula Three in 1972 and won the Lombard North Central, British Formula Three Championship that year. Based upon that success, von Opel commissioned a Formula One chassis. Their first season was not successful, von Opel only finished two races and the team's best result that season was 13th at the 1973 British Grand Prix. Question: How long had Ensign Racing been in business when Serra made one CART Champ Car start at the Portland International Raceway?

Answer: Answer: 12


Question: Context: During the Second World War Link Information: the Second World War, was a global war that lasted from 1939 to 1945 Question: How many years did the Second World War last?

Answer: Answer: 6


Question: Context: Before the start of the 1974–75 season they traded future Hall of Famer Nate Thurmond to the Chicago Bulls Link Information: Thurmond was drafted by the San Francisco Warriors Question: How many NBA teams did the man play for who the Warriors traded to the Bulls?

Answer:
Answer: 3