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 president of', Sentence: 'Barack Obama today becomes the first black president of the United States of America .'

Answer: president


Question: Given Relationship: 'be president of', Sentence: 'Barrack Obama has finally got elected as the President of the United States of America , after months of hard work and his unwavering faith in the electorate .'

Answer: President


Question: Given Relationship: 'be city in', Sentence: 'On the western edge of Lake Michigan in eastern Wisconsin is the city of Milwaukee .'

Answer:
city