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: 'speak at', Sentence: 'He would probably rather forget the principles I heard him defend in a closed forum last year arguing against inviting Ahmadinejad to speak at Columbia after a previous attempt to have him speak at the institution without Bollinger 's knowledge fell through .'
[A]: speak

[Q]: Given Relationship: 'be son of', Sentence: 'Our hope is to know God and His son Jesus fully and to be in fellowship with them forever .'
[A]: son

[Q]: Given Relationship: 'be sign by', Sentence: 'According to the Fair Minimum Wage Act , signed by President George W. Bush in May , the nationwide minimum wage will continue to increase by 70 cents every summer until 2009 , when it will reach $ 7.25 an hour .'
[A]:
signed