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 country in', Sentence: 'Canada and the countries of the Americas are proceeding with Summits and many economic liberalisation negotiations , which , if realised , will transform the political , environmental , social and economic geography of the Western Hemisphere .'
Example Output: countries

Example Input: Given Relationship: 'be battle', Sentence: 'I nietzsche BACTRIM was battling Lyme , BACTRIM got in same tempra .'
Example Output: battling

Example Input: Given Relationship: 'be president of', Sentence: 'A month after writing this , he became President of the United States when Richard M. Nixon resigned .'
Example Output:
President