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 son of', Sentence: 'Peter is called son of John in John 21:15 and Barjona in Matt 16 :17 .'
Example Output: son

Example Input: Given Relationship: 'convert to', Sentence: 'Emperor Constantine converted to Christianity and made it the official religion of the empire .'
Example Output: converted

Example Input: Given Relationship: 'be part of', Sentence: 'From then until the Louisiana Purchase made the region part of the United States on December 20 , 1803 , France and Spain would trade control of the region 's colonial empire .'
Example Output:
part