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.

Example Input: Given Relationship: 'be cause of', Sentence: 'The founder of Alive and Well Los Angeles has been on many TV shows promoting the fact that HIV is not the cause of AIDS .'
Example Output: cause

Example Input: Given Relationship: 'beat', Sentence: 'The Redskins have beaten the Cowboys twice in postseason play .'
Example Output: beaten

Example Input: Given Relationship: 'serve as', Sentence: 'Joseph Livingston , PRC 's Executive Vice President and Chief Operating Officer , will serve as President and Chief Operating Officer of PRC upon completion of the transaction .'
Example Output:
serve