the fluid motion is astounding on any number of levels -- including the physical demands made on büttner -- and it implies in its wake the intractable , irreversible flow of history . 
(ROOT (S (S (NP (DT the) (NN fluid) (NN motion)) (VP (VBZ is) (ADJP (JJ astounding)) (PP (IN on) (NP (NP (DT any) (NN number)) (PP (IN of) (NP (NNS levels))) (, --) (PP (VBG including) (NP (NP (DT the) (JJ physical) (NNS demands)) (VP (VBN made) (PP (IN on) (NP (NNP büttner)))))) (, --))))) (CC and) (S (NP (PRP it)) (VP (VBZ implies) (PP (IN in) (NP (PRP$ its) (NN wake))) (NP (NP (DT the) (JJ intractable) (, ,) (JJ irreversible) (NN flow)) (PP (IN of) (NP (NN history)))))) (. .)))
(ROOT (S (S (NP (DT ) (NN ) (NN )) (VP (VBZ ) (ADJP (JJ )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NNS ))) (, ) (PP (VBG ) (NP (NP (DT ) (JJ ) (NNS )) (VP (VBN ) (PP (IN ) (NP (NNP )))))) (, ))))) (CC ) (S (NP (PRP )) (VP (VBZ ) (PP (IN ) (NP (PRP$ ) (NN ))) (NP (NP (DT ) (JJ ) (, ) (JJ ) (NN )) (PP (IN ) (NP (NN )))))) (. )))