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.
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Question: Given Relationship: 'be secretary of', Sentence: 'He appointed Colin Powell as Secretary of State , Paul O'Neill as Secretary of the Treasury , and Donald Rumsfeld as the Secretary of Defense .'

Answer: Secretary


Question: Given Relationship: 'be elect by', Sentence: 'The General Assembly of ICSU is held every three years to discuss current development of science , to review strategy and programs of ICSU, and to elect a new executive board and officers .'

Answer: elect


Question: Given Relationship: 'join', Sentence: 'President of Russia Vladimir Putin threatened if Ukraine joins the NATO , our country may cease to exist as a united state .'

Answer:
joins