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: 'speak at', Sentence: 'It is true that Mahmod Ahmadinejad is scheduled to speak at Columbia this Monday .'
Example Output: speak

Example Input: Given Relationship: 'be mayor of', Sentence: 'And former New York mayor Rudy Giuliani suggested men of a certain age get checked for prostate cancer , following in the footsteps of former US senator Bob Dole , whose appearances in Viagra ads are credited with persuading more men to discuss erectile dysfunction with their doctors .'
Example Output: mayor

Example Input: Given Relationship: 'discover', Sentence: 'School children throughout the United States and Canada will tell you that Christopher Columbus discovered America when he was searching for a faster , more efficient route to the riches of India .'
Example Output:
discovered