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: 'Buy V-RX Va herbal alternative to Viagra from the online sex store at SexyFun.co.uk .', Argument/Subject 1: 'viagra', Argument/Subject 2: 'online'
buy

Sentence: 'The Web Pen Blog is proudly powered by WordPress .', Argument/Subject 1: 'blog', Argument/Subject 2: 'wordpress'
be power by

Sentence: 'Peter Heimann was born on 14 May 1946 in London .', Argument/Subject 1: 'peter', Argument/Subject 2: 'london'
be bear in