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

Ex Output:
presented


Ex Input:
Given Relationship: 'present to', Sentence: 'Paper presented at the 2007 annual meeting of the Population Association of America , March 29-31 , NYC.'

Ex Output:
presented


Ex Input:
Given Relationship: 'be part of', Sentence: 'What was Korea is a part of Long China .'

Ex Output:

part