( ( Movement ( of ( these molecules ) ) ) ( ( is ( accompanied ( by ( ( the ( passive movement ) ) ( of water ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Movement)) (PP (IN of) (NP (DT these) (NNS molecules)))) (VP (VBZ is) (VP (VBN accompanied) (PP (IN by) (NP (NP (DT the) (JJ passive) (NN movement)) (PP (IN of) (NP (NN water))))))) (. .)))
Movement of these molecules is accompanied by the passive movement of water.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT the) (NN movement)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN across) (NP (DT a) (ADJP (JJ membrane) (PP (IN without) (NP (NP (DT the) (NN input)) (PP (IN of) (NP (NN energy)))))) (JJ passive) (NN transport))))))) (. .)))