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.

Context : Cadbury is headquartered in Uxbridge, Greater London and operates in more than fifty countries worldwide. 
Question : Which company is the parent company of Cadbury?
parent company

Context : Sang Penari touches on the history of communism in Indonesia, focusing on the nation's communist party spreading its ideology and the government's purge of the Communist Party's members from 1965--1966, which is thought to have killed several hundred thousand. 
Question : The Sang Penari is based upon what?
based on

Context : Ioanna Chatziioannou (Greek: Ιωάννα Χατζηιωάννου; born October 22, 1973 in Germany) is a retired female weightlifter from Greece. 
Question : What is the sex or gender of Ioanna Chatziioannou?

sex or gender