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 chief of', Sentence: 'We work for the Chief Executive Officer also known as The President of the United States .'
Chief

Given Relationship: 'attack', Sentence: 'It is no surprise to many Americans to hear that Bush may want to attack Iran on the same grounds he attacked Iraq .'
attack

Given Relationship: 'be trademark of', Sentence: 'The Windows Vista brand and logo are trademarks of Microsoft Corporation .'

trademarks