the story , once it gets rolling , is nothing short of a great one . 
(ROOT (S (NP (DT the) (NN story)) (, ,) (SBAR (IN once) (S (NP (PRP it)) (VP (VBZ gets) (VP (VBG rolling))))) (, ,) (VP (VBZ is) (NP (NP (NN nothing)) (ADJP (JJ short) (PP (IN of) (NP (DT a) (JJ great) (NN one)))))) (. .)))
(ROOT (S (NP (DT ) (NN )) (, ) (SBAR (IN ) (S (NP (PRP )) (VP (VBZ ) (VP (VBG ))))) (, ) (VP (VBZ ) (NP (NP (NN )) (ADJP (JJ ) (PP (IN ) (NP (DT ) (JJ ) (NN )))))) (. )))