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 president of', Sentence: 'Barack Obama today becomes the first black president of the United States of America .'

Answer: president

Question: Given Relationship: 'present at', Sentence: 'Paper presented to the International Pragmatics Conference , Tel Aviv June 14 .'

Answer: presented

Question: Given Relationship: 'be base in', Sentence: 'Fresh Web Studios Commercial Web Site Design Company , based in Chester , Cheshire ...'

Answer:
based