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.

Input: Consider Input: Context : Stalk of the Celery Monster is a 1979 short animated film written, directed and animated entirely in pencil by Tim Burton during his time as a student with the California Institute of the Arts. 
Question : What production company was involved in Stalk of the Celery Monster?

Output: production company


Input: Consider Input: Context : Francis Heaulme (born February 25, 1959 at Metz) is a French serial killer dubbed the ``Criminal Backpacker''. 
Question : Which crime led to the conviction of Francis Heaulme?

Output: convicted of


Input: Consider Input: Context : Operating for a little more than a year, the airline was purchased by American Airlines for $1,400,000.00 through a complicated agreement primarily to obtain the Contract Air Mail (CAM) 33 mail services contract won by Halliburton and Southwest Air Fast Express. 
Question : What company is Southwest Air Fast Express part of?


Output: parent company