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 governor of', Sentence: 'George W. Bush was only the governor of Texas before being elected to the Presidency .'
[EX A]: governor

[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: 'require', Sentence: 'Files in PDF format require Adobe Acrobat or Acrobat Reader .'
[EX A]:
require