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.
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Question: 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 .'

Answer: neighborhood

Question: Given Relationship: 'convert to', Sentence: 'After it converts ATP to ADP , the level of the latter accumulates outside the cell and the purine can bind to a purine receptor called P2Y1 .'

Answer: converts

Question: Given Relationship: 'begin in', Sentence: 'Christianity began in 1st century AD Jerusalem as a Jewish sect but quickly spread throughout the Roman Empire and beyond to countries such as Ethiopia , Armenia , Georgia , Assyria , Iran , India , and China .'

Answer:
began