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: 'join', Sentence: 'Why did Denmark join the European Union in 1973 ?'
Example Output: join

Example Input: Given Relationship: 'be descendant of', Sentence: 'Both Jews and Gentiles can become spiritual descendants of Abraham by believing on Jesus .'
Example Output: descendants

Example Input: Given Relationship: 'be language of', Sentence: 'Welsh is the official language of Wales .'
Example Output:
language