TASK DEFINITION: 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.
PROBLEM: Given Relationship: 'be president of', Sentence: 'Barack Obama today becomes the first black president of the United States of America .'

SOLUTION: president

PROBLEM: Given Relationship: 'be governor of', Sentence: 'His candidacy galvanized young and idealistic voters in much the same way that former Vermont governor Howard Dean energized those opposed to the war in Iraq .'

SOLUTION: governor

PROBLEM: Given Relationship: 'be city in', Sentence: 'Charlotte is the most beautiful city in North Carolina .'

SOLUTION:
city