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

Example input: Context : Isaac Nicola Romero (1916 in Havana, Cuba -- 1997) was a prominent Cuban guitarist and one of the founders of the modern Cuban Guitar School. 
Question : What was Isaac Nicola's city of birth?
Example output: Havana
Example explanation: According to context Issac Nicola's city of birth is Havana. Hence this is a correct output.
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 year was Sinclair Scientific commissioned?
A:
1974