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 build on', Sentence: 'The Parthenon is the largest and most important building on the Acropolis .'

Answer: building


Question: Given Relationship: 'open in', Sentence: 'Registration will open in late May for the ensuing Fall Flag Football season .'

Answer: open


Question: Given Relationship: 'attack', Sentence: 'Kanaya enlisted in the US Army before Japan attacked Pearl Harbor .'

Answer:
attacked