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.

Q: 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'

A: buy
****
Q: Sentence: 'I could not have been in a better place to witness Barack Obama elected president of the United States .', Argument/Subject 1: 'obama', Argument/Subject 2: 'unite state'

A: be president of
****
Q: Sentence: 'The second larger city in Egypt is Alexandria , extends about 32 km along the coast of the Mediterranean sea in Egypt , it is home to the Bibliotheca Alexandrina - the New Library of Alexandria .', Argument/Subject 1: 'alexandrium', Argument/Subject 2: 'egypt'

A:
be city of
****