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 : General S. Cyril Ranatunga, VSV, rcds, psc was a Sri Lankan general and diplomat. 
Question : What was Cyril Ranatunga's occupation?

Answer: occupation


Question: Context : Hiram Burnham (1814 -- September 29, 1864) was an officer in the Union Army who commanded a regiment and then a brigade in the Eastern Theater of the American Civil War. 
Question : What military organization did Hiram Burnham belong to?

Answer: military branch


Question: Context : In cryptography, RC6 (Rivest cipher 6) is a symmetric key block cipher derived from RC5. 
Question : The RC6 is based upon what?

Answer:
based on