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 centre of', Sentence: 'Although it is thought that Tokyo is the fashion centre of Japan , fashion experts say Osaka is where the big trends actually start .'
Example Output: centre

Example Input: Given Relationship: 'be neighborhood in', Sentence: 'For April 2008 , the average home selling price in the San Francisco neighborhood of Potrero Hill was $ 681,333 .'
Example Output: neighborhood

Example Input: Given Relationship: 'be heart of', Sentence: 'The University of Texas at Austin is located in the heart of the city of Austin , just north of the downtown area .'
Example Output:
heart