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.

Given Relationship: 'be president of', Sentence: 'Egypt 's President Hosni Mubarak is receiving tomorrow Palestinian President Yasser Arafat who is visiting Egypt before heading to Washington to attend the three-way summit that was urged on by the U.S President Bill Clinton and will be attended by Arafat and Israeli Prime Minister Ehud Barak .'
President

Given Relationship: 'present at', Sentence: 'Paper presented at the 10th International Conference on Turkish Linguistics , 16-18 August , Bozi University , Istanbul , Turkey .'
presented

Given Relationship: 'be chair of', Sentence: 'The Nominating Committee is chaired by the Past-President .'

chaired