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

Given Relationship: 'be university in', Sentence: 'Cornell University HCI Group working out of Cornell University in Ithaca NY , United States .'
University

Given Relationship: 'be border by', Sentence: 'Bulgaria is bordered by Romania to the north , by Turkey and Greece to the south , by Serbia and Macedonia to the west and by the Black Sea to the east .'

bordered