Given the task definition and input, reply with output. 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: 'Joseph " Boca Joe " Fafone and Joseph Fafone Jr are the father and son tandem that is convicted of illegal gambling charges for their work in the Bestlinesports .com .', Argument/Subject 1: 'joe', Argument/Subject 2: 'joseph'
be son of