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.

[Q]: Given Relationship: 'discover', Sentence: 'They were all established in Polynesia before Columbus discovered America , and hence could not have been introduced by later Spanish vessels .'
[A]: discovered


[Q]: Given Relationship: 'win', Sentence: 'The SNP are also riding high in the polls and won the Labour stronghold of Glasgow East last month . ''
[A]: in


[Q]: Given Relationship: 'be chairman of', Sentence: 'In his gloomiest assessment to date , US Federal Reserve chairman Alan Greenspan warned that closing the budget gap will become much more difficult if Congress fails to take major action to reduce the deficits .'
[A]:
chairman