instruction:
Classify the relation of question with context to one of these categories: 1) award received, 2) based on, collection, 3) conflict, 4) constellation, 5) convicted of, 6) date of death, 7) director, 8) drafted by, 9) educated at, 10) medical condition, 11) military branch, 12) narrative location, 13) occupation, 14) original network, 15) parent company, 16) point in time, 17) production company, 18) residence, 19) series, 20) service entry, 21) sex or gender, 22) spouse, 23) standards body question.
question:
Context : Philipp Krementz was born, the son of a butcher, in Koblenz in 1837 and began to study theology in Bonn, which he continued in Munich in 1839. 
Question : What was the death date of Philipp Krementz?
answer:
date of death


question:
Context : What later became known as the Whirlpool Galaxy was discovered on October 13, 1773 by Charles Messier while hunting for objects that could confuse comet hunters, and was designated in Messier's catalogue as M51. 
Question : The star Whirlpool Galaxy is part of the constellation known as what?
answer:
constellation


question:
Context : Born in Heaton Chapel, Lancashire, on 10 June 1908, Felix Warden Brown was educated at Bedford School, at Keble College, Oxford, at the Royal London Hospital, where he qualified in Medicine in 1932, and at Johns Hopkins University, where he trained in psychiatry under Adolf Meyer. 
Question : What is Felix Warden Brown's spouse's name?
answer:

spouse