( They ( ( live ( ( ( ( ( ( on land ) , ) ( in ( the air ) ) ) , ) and ) ( in water ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP live) (PP (PP (IN on) (NP (NN land))) (, ,) (PP (IN in) (NP (DT the) (NN air))) (, ,) (CC and) (PP (IN in) (NP (NN water))))) (. .)))
They live on land, in the air, and in water.
(ROOT (S (NP (DT The) (NN water) (NN cycle)) (VP (VBZ involves) (NP (NP (NN movement)) (PP (IN of) (NP (NP (NN water)) (PP (IN between) (NP (NN air) (CC and) (NN land))))))) (. .)))