Complex sentence: Ryan Matthew Dunn (June 11,1977--June 20,2011) was an American reality television personality, actor and stunt man best known for being a member of the "Jackass" and "Viva La Bam" crew.
Split into simpler sentences: Ryan Matthew Dunn (June 11,1977--June 20,2011) was an American reality television personality, stuntman, and actor. He is best known for being a member of the "Jackass" and "Viva La Bam" crew.