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 call', Sentence: 'God through the Holy Spirit is calling the Methodist people everywhere to a strengthened and sustained thrust in world mission and evangelism .'
Example Output: calling

Example Input: Given Relationship: 'be president of', Sentence: 'Barrack Obama has finally got elected as the President of the United States of America , after months of hard work and his unwavering faith in the electorate .'
Example Output: President

Example Input: Given Relationship: 'be son of', Sentence: 'The only begotten son of God is Jesus Christ .'
Example Output:
son