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 country in', Sentence: 'Germany is one of the most powerful countries in Europe , yet remains little understood , by itself or the rest of the world .'
Example Output: countries

Example Input: Given Relationship: 'open on', Sentence: 'Registration is now open for the forthcoming test administrations on January 21 and February 10 , 2007 .'
Example Output: open

Example Input: Given Relationship: 'attack', Sentence: 'Only a deranged nut would oppose Bush warning Iran not to attack us .'
Example Output:
attack