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: 'Gradually the official language of Ukrainian provinces under Poland was changed to Polish , while the upper classes in the Russian part of Ukraine used Russian widely .', Argument/Subject 1: 'polish', Argument/Subject 2: 'poland'
be language of

Sentence: 'The StartUp Blog at PartnerUp is powered by WordPress 2.2.2 and delivered to you in 1.003 seconds using 9 queries .', Argument/Subject 1: 'blog', Argument/Subject 2: 'wordpress'
be power by

Sentence: 'It runs on Microsoft Windows , Apple Mac OS X , and Linux , and is available in several versions .', Argument/Subject 1: 'window', Argument/Subject 2: 'mac'
run on