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.

Ex Input:
Context : ISO 3166-2:NG is the entry for Nigeria in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. 
Question : Who set the standards for ISO 3166-2:NG?

Ex Output:
standards body


Ex Input:
Context : According to the Greek historian Herodotus (VI, 43) Artazostre was given in marriage to Mardonius, young son of the noble Gobryas, not much before he took the command of the Persian army in Thrace and Macedon (c. 493/492 BC). 
Question : What is Artazostre's spouse's name?

Ex Output:
spouse


Ex Input:
Context : Brett Ritchie (born July 1, 1993) is a Canadian ice hockey player who is currently playing for the Dallas Stars in the National Hockey League. 
Question : What team did Brett Ritchie play for?

Ex Output:

drafted by