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.

[EX Q]: Given Relationship: 'be president of', Sentence: 'At noon EST , Barack H. Obama became the 44th president of the United States of America .'
[EX A]: president

[EX Q]: Given Relationship: 'be mayor of', Sentence: 'And former New York mayor Rudy Giuliani suggested men of a certain age get checked for prostate cancer , following in the footsteps of former US senator Bob Dole , whose appearances in Viagra ads are credited with persuading more men to discuss erectile dysfunction with their doctors .'
[EX A]: mayor

[EX Q]: Given Relationship: 'present to', Sentence: 'Paper presented at the Csoma de Koros Symposium , Sopron , Hungary , August 29-September 4 , 1987 .'
[EX A]:
presented