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.

Given Relationship: 'join', Sentence: 'Why did Denmark join the European Union in 1973 ?'
join

Given Relationship: 'be baptize in', Sentence: 'This was prophetically foretold when John baptized many believers in the Jordan .'
baptized

Given Relationship: 'convert to', Sentence: 'The christian countries need to offer an exchange program for Christians and other non-muslim converts in Islam .'
converts