Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.

Example Input: Sentence: 'I was editor of Surfer magazine , and Richard Nixon was president of the United States .', Argument/Subject 1: 'nixon', Argument/Subject 2: 'unite state'
Example Output: be president of

Example Input: Sentence: 'Prime Minister Geir Haarde has called an election for May and said he 'll step down because of illness .', Argument/Subject 1: 'haarde', Argument/Subject 2: 'may'
Example Output: call election for

Example Input: Sentence: 'Thus George Washington , the first president of the United States , raised the first taxes on alcoholic distillates in 1791 .', Argument/Subject 1: 'george', Argument/Subject 2: 'unite state'
Example Output:
be president of