( Which ( ( ( utilizes ( the ( circulatory system ) ) ) ( to ( transport signals ) ) ) ? ) )
(ROOT (SBARQ (WHNP (WP Which)) (SQ (VP (VBZ utilizes) (NP (DT the) (JJ circulatory) (NN system)) (PP (TO to) (NP (NN transport) (NNS signals))))) (. ?)))
Which utilizes the circulatory system to transport signals?
(ROOT (S (NP (NP (DT The) (JJ main) (NN function)) (PP (IN of) (NP (DT the) (JJ circulatory) (NN system)))) (VP (VBZ is) (S (VP (TO to) (VP (VB transport) (NP (NNS materials)))))) (. .)))