( They ( ( are ( found ( ( ( ( ( ( in ( the air ) ) , ) ( on land ) ) , ) and ) ( in water ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (VP (VBN found) (PP (PP (IN in) (NP (DT the) (NN air))) (, ,) (PP (IN on) (NP (NN land))) (, ,) (CC and) (PP (IN in) (NP (NN water)))))) (. .)))
They are found in the air, on land, 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))))))) (. .)))