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: 'discover', Sentence: 'They were all established in Polynesia before Columbus discovered America , and hence could not have been introduced by later Spanish vessels .'
Example Output: discovered

Example Input: Given Relationship: 'declare war on', Sentence: 'When the United States declared war on Germany on April 6 , 1917 , Hemingway tried to enlist in the army .'
Example Output: declared

Example Input: Given Relationship: 'be language in', Sentence: 'It is the official language of the French Community and the dominant language of Wallonia , in the south .'
Example Output:
language