( ( ( Summarize changes ) ( to ( the earth ) ) ) ( ( caused ( by ( erosion ( , ( weathering ( and ( mass wasting ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Summarize) (NNS changes)) (PP (TO to) (NP (DT the) (NN earth)))) (VP (VBD caused) (PP (IN by) (NP (NN erosion) (, ,) (NN weathering) (CC and) (NN mass) (NNS wasting)))) (. .)))
Summarize changes to the earth caused by erosion, weathering and mass wasting.
(ROOT (S (NP (NP (DT The) (NN movement)) (PP (IN of) (NP (NP (DT an) (NN air) (NN mass)) (PP (IN over) (NP (NP (NN earth) (POS 's)) (NN surface)))))) (VP (VBZ causes) (NP (JJ local) (NN weather) (NNS changes))) (. .)))