TASK DEFINITION: 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.
PROBLEM: Context : The Portrait of Francesco delle Opere is a painting by the Italian Renaissance artist Perugino, dating to 1494 and housed in the Uffizi Gallery, Florence. 
Question : What is the name of the place where Portrait of Francesco delle Opere can be found?

SOLUTION: collection

PROBLEM: Context : Wolfgang Kretzschmar (2 July 1907 -- 27 December 1944) was a German officer serving during World War II and recipient of the coveted Knight's Cross of the Iron Cross with Oak Leaves and Swords (German: Ritterkreuz des Eisernen Kreuzes mit Eichenlaub und Schwertern). 
Question : In which war did Wolfgang Kretzschmar serve?

SOLUTION: conflict

PROBLEM: Context : Bernhard Stavenhagen (24 November 1862 -- 25 December 1914) was a German pianist, composer and conductor. 
Question : On what date did Bernhard Stavenhagen expire?

SOLUTION:
date of death