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 : However, in 644, Hormuzan was killed by Umar's son 'Ubaid-Allah, after an involvement in a plot which killed Umar. 
Question : Which war did Hormuzan participate in?

SOLUTION: conflict

PROBLEM: Context : The Moxy Show (also known as The Moxy Pirate Show and The Moxy & Flea Show) is an animation anthology television series produced by Colossal Pictures for Cartoon Network. 
Question : What was the original network for The Moxy Show?

SOLUTION: original network

PROBLEM: Context : Elections to the European Parliament were held in Belgium on June 12, 1994. 
Question : On what date did Elections to the European Parliament occur?

SOLUTION:
point in time