holland lets things peter out midway , but 
(ROOT (S (S (NP (NNP holland)) (VP (VBZ lets) (S (NP (NNS things)) (VP (VB peter) (PRT (RP out)) (ADVP (RB midway)))))) (, ,) (CC but)))
(ROOT (S (S (NP (NNP )) (VP (VBZ ) (S (NP (NNS )) (VP (VB ) (PRT (RP )) (ADVP (RB )))))) (, ) (CC )))