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 : Aner Shalev (born 24 January 1958) is a professor at the Einstein Institute of Mathematics at the Hebrew University of Jerusalem, and a writer. 
Question : What is the name university that educated Aner Shalev?
answer:
educated at


question:
Context : Jozef Stümpel (born July 20, 1972) is a Slovak professional ice hockey centre currently playing for HK Nitra of the Slovak Extraliga. 
Question : Player Jozef Stümpel played for which team?
answer:
drafted by


question:
Context : Son of a Witch (2005, ISBN 0-06-074722-6) is a fantasy novel written by Gregory Maguire. 
Question : Which series is Son of a Witch a part of?
answer:

series