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.

Input: Consider Input: Given Relationship: 'open', Sentence: 'Registration will open on February 1st , 2009 at 00:01 MA time and will close on February 10th , 2009 at 23 :59 MA time .'

Output: open

Input: Consider Input: Given Relationship: 'be president of', Sentence: 'When Barack Obama became the 44th president of United States , there was a sense of ecstasy , joy and relief in virtually every country of the world , except in Pakistan , Iraq and Afghanistan .'

Output: president

Input: Consider Input: Given Relationship: 'be editor of', Sentence: '" William Kristol is editor of The Weekly Standard , as well as chairman and co-founder of the Project for the New American Century .'
Output: editor