What type of details about robert f. x. sillerman can be gathered from the following bio? Bio: robert francis xavier sillerman -lrb- born april 12 , 1948 -rrb- is an american businessman and media entrepreneur . sillerman was the owner of a range of television and radio stations during the 1970s and 1980s , in 1993 he formed sfx broadcasting , and then built sfx entertainment -- a concert and stage performance promoter that was sold to clear channel in 2000 for $ 4.4 billion . he refounded sfx entertainment in 2012 as a promoter of electronic music festivals , and is also the founder of viggle . he is also the namesake of the sillerman center for the advancement of philanthropy at brandeis university . once on the forbes 400 list , he also briefly owned the wlaf 's new york/new jersey knights .
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