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 : Kujava Radinović was the second wife of King Stephen Ostoja of Bosnia and as such she was Queen of Bosnia from 1399 to 1404 and again from 1409 to 1415. 
Question : What is Kujava Radinović's spouse's name?

SOLUTION: spouse

PROBLEM: Context : ISO 3166-2:BN is the entry for Brunei 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:BN?

SOLUTION: standards body

PROBLEM: Context : The Xianfeng Emperor (simplified Chinese: 咸丰帝; traditional Chinese: 咸豐帝; pinyin: Xiánfēng Dì; Wade--Giles: Hsien-feng Ti; 17 July 1831 -- 22 August 1861), personal name I-ju (or Yizhu), was the ninth Emperor of the Manchu-led Qing dynasty, and the seventh Qing emperor to rule over China, from 1850 to 1861. 
Question : What is Xianfeng Emperor's spouse's name?

SOLUTION:
spouse