( ( a -RRB- ) ( ( ( Facilitated diffusion ) ( -LRB- ( ( passive transport ) -RRB- ) ) ) ( ( requires ( ( a protein ) ( known as ) ) ) ... ) ) )
(ROOT (S (LST (LS a) (-RRB- -RRB-)) (NP (NP (NNP Facilitated)) (VP (VBN diffusion)) (PRN (-LRB- -LRB-) (NP (JJ passive) (NN transport)) (-RRB- -RRB-))) (VP (VBZ requires) (NP (NP (DT a) (NN protein)) (ADJP (VBN known) (IN as)))) (. ...)))
a) Facilitated diffusion (passive transport) requires a protein known as .....................
(ROOT (S (SBAR (IN Because) (S (S (NP (DT the) (NN solute)) (VP (VBZ is) (VP (VBG moving) (PRT (RP down)) (NP (DT the) (NN concentration) (NN gradient))))) (, ,) (CC and) (S (NP (NP (DT no) (NN input)) (PP (IN of) (NP (NN energy)))) (VP (VBZ is) (VP (VBN required)))))) (, ,) (NP (JJ facilitated) (NN diffusion)) (VP (VBZ is) (VP (VBN considered) (NP (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (JJ passive) (NN type)) (PP (IN of) (NP (NN transport)))))) (. .)))