Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

[EX Q]: Context : Albertina Walker (August 29, 1929 -- October 8, 2010) was an American gospel singer, song writer, actress, and humanitarian. 
Answer : singer
[EX A]: What was Albertina Walker's occupation?

[EX Q]: Context : The Carquinez Bridge refers to parallel bridges spanning the Carquinez Strait, forming part of Interstate 80 between Crockett and Vallejo, in the U.S. state of California. 
Answer : Carquinez Strait
[EX A]: What river does Carquinez Bridge cross?

[EX Q]: Context : ISO 639 is a set of standards by the International Organization for Standardization that is concerned with representation of names for language and language groups. 
Answer : International Organization for Standardization
[EX A]:
Who set the standards for ISO 639?