, it does so without compromising that complexity . 
(ROOT (S (, ,) (NP (PRP it)) (VP (VBZ does) (ADVP (RB so)) (PP (IN without) (S (VP (VBG compromising) (NP (DT that) (NN complexity)))))) (. .)))
(ROOT (S (, ) (NP (PRP )) (VP (VBZ ) (ADVP (RB )) (PP (IN ) (S (VP (VBG ) (NP (DT ) (NN )))))) (. )))