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.

Example Input: Given Relationship: 'be president of', Sentence: 'Barack Obama today becomes the first black president of the United States of America .'
Example Output: president

Example Input: Given Relationship: 'bless', Sentence: 'God Bless America God bless the World .'
Example Output: bless

Example Input: Given Relationship: 'be require to read', Sentence: 'Reading PDFs requires Adobe Acrobat Reader .'
Example Output:
requires