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.
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Question: Context : Columbus Nova is an investment company founded in 2000 and centered in New York City. 
Question : Which company is the parent company of Columbus Nova?

Answer: parent company


Question: Context : The Esterhazy Madonna is a 1508 painting by Raphael, held at the Museum of Fine Arts in Budapest, in Hungary. 
Question : What is the name of the place where Esterhazy Madonna can be found?

Answer: collection


Question: Context : Roger Warren (born December 17, 1943) is a former miner who was convicted of nine counts of second-degree murder in connection to the September 18, 1992 Giant Mine bombings at Yellowknife, Northwest Territories, Canada. 
Question : For what crime was Roger Warren prosecuted?

Answer:
convicted of