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

Context : Ivo Heuberger was born in the small town of Altstatten, Switzerland on February 19, 1976.
Question : What city is Ivo Heuberger from?
Altstatten

Context : John Anthony Walker, Jr. (July 28, 1937 -- August 28, 2014) was a United States Navy Chief Warrant Officer and communications specialist convicted of spying for the Soviet Union from 1968 to 1985.
Question : What armed force was John Anthony Walker in?
United States Navy

Context : Han Na-lae (born 6 July 1992 in Incheon) is a South Korean tennis player.
Question : What city is Han Na-lae associated with?
Incheon