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 language of', Sentence: 'Gaelic remained the language of the Kings of Scotland for centuries though after 1100 English was introduced in the Court by the hand of Margaret Queen to Malcolm Canmore and the daughter of the king of the Angles .'
[EX A]: language

[EX Q]: Given Relationship: 'be president of', Sentence: 'A month after writing this , he became President of the United States when Richard M. Nixon resigned .'
[EX A]: President

[EX Q]: Given Relationship: 'be president of', Sentence: 'This background makes clear the historic nature of a speech by the president of Pakistan , Pervez Musharraf , to the American Jewish Congress on September 17 .'
[EX A]:
president