need to adhere more closely to the laws of laughter 
(ROOT (VP (VB need) (S (VP (TO to) (VP (VB adhere) (ADVP (RBR more) (RB closely)) (PP (IN to) (NP (NP (DT the) (NNS laws)) (PP (IN of) (NP (NN laughter))))))))))
(ROOT (VP (VB ) (S (VP (TO ) (VP (VB ) (ADVP (RBR ) (RB )) (PP (IN ) (NP (NP (DT ) (NNS )) (PP (IN ) (NP (NN ))))))))))