if swimfan does catch on , it may be because teens are looking for something to make them laugh . 
(ROOT (S (SBAR (IN if) (S (NP (NN swimfan)) (VP (VBZ does) (VP (VB catch) (PRT (RP on)))))) (, ,) (NP (PRP it)) (VP (MD may) (VP (VB be) (SBAR (IN because) (S (NP (NNS teens)) (VP (VBP are) (VP (VBG looking) (PP (IN for) (NP (NP (NN something)) (SBAR (S (VP (TO to) (VP (VB make) (S (NP (PRP them)) (VP (VB laugh))))))))))))))) (. .)))
(ROOT (S (SBAR (IN ) (S (NP (NN )) (VP (VBZ ) (VP (VB ) (PRT (RP )))))) (, ) (NP (PRP )) (VP (MD ) (VP (VB ) (SBAR (IN ) (S (NP (NNS )) (VP (VBP ) (VP (VBG ) (PP (IN ) (NP (NP (NN )) (SBAR (S (VP (TO ) (VP (VB ) (S (NP (PRP )) (VP (VB ))))))))))))))) (. )))