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.

[EX Q]: Sentence: 'Switch Guide is devoted to assisting and encouraging users wishing to switch from Microsoft Internet Explorer to a safer and better-performing alternative in Netscape , Mozilla , or Firefox and Thunderbird .', Argument/Subject 1: 'netscape', Argument/Subject 2: 'internet explorer'
[EX A]: be alternative to

[EX Q]: Sentence: 'What SIBUTRAMINE was born in NYC.', Argument/Subject 1: 'sibutramine', Argument/Subject 2: 'nyc'
[EX A]: be bear in

[EX Q]: Sentence: 'Joe Biden says Senator Obama has " a spine of steel . "', Argument/Subject 1: 'biden', Argument/Subject 2: 'obama'
[EX A]:
say of