Generate a correct and concise answer for the question based on the words in the context.
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Question: 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 : In which year was the service entry date for Sinclair Scientific?

Answer: 1974


Question: Context : Winona Cargile Alexander (June 21, 1893 -- October 16, 1984) was a founder of Delta Sigma Theta Sorority, Incorporated at Howard University on January 13, 1913. 
Question : Where did Winona Cargile Alexander study or work?

Answer: Howard University


Question: Context : Robert Martinek (2 February 1889 -- 28 June 1944) was an artillery officer in the Austro-Hungarian Army during World War I, the Austrian Bundesheer and, during World War II, in the Wehrmacht Heer, who came to be regarded as one of the most skilled artillerymen of his generation. 
Question : What war or battle did Robert Martinek fight in?

Answer:
World War I