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 Input:
Given Relationship: 'speak at', Sentence: 'It is true that Mahmod Ahmadinejad is scheduled to speak at Columbia this Monday .'

Ex Output:
speak


Ex Input:
Given Relationship: 'present at', Sentence: 'Paper presented at Workshop on Economics , IUCN General Assembly , 4-5th February , Costa Rica .'

Ex Output:
presented


Ex Input:
Given Relationship: 'be locate in', Sentence: 'Our offices are conveniently located in NW Calgary in close proximity to Market Mall , the University of Calgary and the new Children 's Hospital .'

Ex Output:

located