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.

Sentence: 'Bank of America had acquired Merrill Lynch for $ 50 billion last year .', Argument/Subject 1: 'bank of america', Argument/Subject 2: 'merrill lynch'
acquire

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'
be president of

Sentence: 'Microsoft recently released a beta version of Internet Explorer 6 that includes many fixes to their Cascading Stylesheet implementation .', Argument/Subject 1: 'microsoft', Argument/Subject 2: 'internet explorer'

release version of