TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : John Nelson Shanks (December 23, 1937 -- August 28, 2015) was an American artist and painter. 
Question : What was Nelson Shanks's career?

SOLUTION: painter

PROBLEM: Context : The ESO 3.6 m Telescope is an optical reflecting telescope run by the European Southern Observatory at La Silla Observatory, Chile since 1977, with a clear aperture of about 3.6 metres (140 in) and 8.6 m2 (93 sq ft) area. 
Question : In which year was the service entry date for ESO 3.6 m Telescope?

SOLUTION: 1977

PROBLEM: Context : Horst Rudat (born 3 May 1920 in Wirtkallen, district Insterburg, East Prussia; died 31 August 1982 in Laaber/Waldelzerberg) was a German World War II Luftwaffe bomber pilot. 
Question : In which war did Horst Rudat serve?

SOLUTION:
World War II