Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Example Input: Context : Bárbara Allende Gil de Biedma known as Ouka Leele (Madrid, June 29, 1957) is a Spanish photographer. 
Answer : photographer
Example Output: What kind of  occupation does Ouka Leele have?

Example Input: Context : Diary of a Camper is a short 1996 American film made using id Software's 1996 first-person shooter computer game Quake. 
Answer : Quake
Example Output: Which is the basis of Diary of a Camper?

Example Input: Context : PetroChina Company Limited (simplified Chinese: 中国石油天然气股份有限公司; traditional Chinese: 中國石油天然氣股份有限公司; Uyghur: چوڭگو نېفتى‎) is a Chinese oil and gas company and is the listed arm of state-owned China National Petroleum Corporation (CNPC), headquartered in Dongcheng District, Beijing. 
Answer : China National Petroleum Corporation
Example Output:
Which company is the parent company of PetroChina?