Generate a correct and concise answer for the question based on the words in the context.

[Q]: Context : The Sinclair Scientific calculator was a 12-function, pocket-sized scientific calculator introduced in 1974, dramatically undercutting in price other calculators available at the time. 
Question : What was the year Sinclair Scientific entered service?
[A]: 1974


[Q]: Context : L'Ile Mysterieuse / La Isla misteriosa y el capitán Nemo / Die Geheimnisvolle Insel (The Mysterious Island) is a 1973 European TV miniseries production (300 minutes) adapted from Jules Verne's novel L'Île mystérieuse. 
Question : Which is the basis of La Isla misteriosa y el capitán Nemo?
[A]: The Mysterious Island


[Q]: Context : Leon Ehrenpreis (May 22, 1930 - August 16, 2010, Brooklyn) was a mathematician at Temple University who proved the Malgrange-- 
Question : What was Leon Ehrenpreis's occupation?
[A]:
mathematician