From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'be bishop of', Sentence: 'The Bishops of Rome petitioned Pope Clement VIII to forbid coffee drinking to all of Christendom .'
Bishops

Given Relationship: 'become', Sentence: 'The organization which evolved was the guts of the unit which became the OSS and later the CIA .'
became

Given Relationship: 'approve', Sentence: 'Viagra prescriptions were approved by the FDA in March 1998 for the treatment of male impotency .'

approved