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.
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Question: 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'

Answer: buy

Question: Sentence: 'Bill served his country in the U.S. Navy for three years before marrying in 1961 .', Argument/Subject 1: 'bill', Argument/Subject 2: 'us navy'

Answer: serve in

Question: Sentence: 'He was recently elected Chair of the Board of External Auditors of the Organization of American States .', Argument/Subject 1: 'chair', Argument/Subject 2: 'board'

Answer:
be elect by