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 : 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?

SOLUTION: standards body

PROBLEM: Context : Chen Shaoguo (simplified Chinese: 陈绍果; traditional Chinese: 陳紹果; pinyin: Chén Shàoguǒ; born January 20, 1971) is a retired male race walker from PR China. 
Question : Which gender does Chen Shaoguo belong to?

SOLUTION: sex or gender

PROBLEM: Context : Swiss Private Aviation AG was a fully owned subsidiary of Swiss International Air Lines providing executive jet services as well as aircraft management and commercial charter services on behalf of its parent company. 
Question : What is Swiss Private Aviation's parent company?

SOLUTION:
parent company