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.

Q: Context : Pedro Albizu Campos was born in the Tenerías sector of Barrio Machuelo Abajo in Ponce, Puerto Rico to Juana Campos, a domestic worker of Spanish, African and Taíno ancestry, on 12 September 1891. 
Question : What was Pedro Albizu Campos's occupation?

A: occupation
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Q: Context : Earl Derr Biggers (August 26, 1884 -- April 5, 1933) was an American novelist and playwright. 
Question : What is the university where Earl Derr Biggers went?

A: educated at
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Q: Context : The BMD-1 is a Soviet airborne amphibious tracked infantry fighting vehicle, which was introduced in 1969 and first seen by the West in 1970. 
Question : What year was BMD-1 commissioned?

A:
service entry
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