relies on toilet humor , ethnic slurs 
(ROOT (S (VP (VBZ relies) (PP (IN on) (NP (NP (NN toilet) (NN humor)) (, ,) (NP (JJ ethnic) (NNS slurs)))))))
(ROOT (S (VP (VBZ ) (PP (IN ) (NP (NP (NN ) (NN )) (, ) (NP (JJ ) (NNS )))))))