Definition: 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: Given Relationship: 'be president of', Sentence: 'The conference , attended by Czech Prime Minister and President of the EU Council Mirek Topol?nek , members of the Czech , Polish , and Swedish government and European Energy Commissioner Andris Piebalgs , took place in Ostrava today .'
Output:
President