( ( ( Cyclones and ) anticyclones ) ( ( ( ( ( move slowly ) ( across ( the ( earth ( s surface ) ) ) ) ) , ) ( ( ( bringing changes ) ( in ( the weather ) ) ) ( as ( they ( move ( ( Weather systems ) ( are ( associated ( to ( ( the motion ) ( of ( ( large ( air masses ) ) 1 ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Cyclones) (CC and) (NNS anticyclones)) (VP (VBP move) (ADVP (RB slowly)) (PP (IN across) (NP (DT the) (NN earth) (NN s) (NN surface))) (, ,) (S (VP (VBG bringing) (NP (NNS changes)) (PP (IN in) (NP (DT the) (NN weather))) (SBAR (IN as) (S (NP (PRP they)) (VP (VBP move) (SBAR (S (NP (NNP Weather) (NNS systems)) (VP (VBP are) (VP (VBN associated) (PP (TO to) (NP (NP (DT the) (NN motion)) (PP (IN of) (NP (NP (JJ large) (NN air) (NNS masses)) (NP (CD 1)))))))))))))))) (. .)))
Cyclones and anticyclones move slowly across the earth s surface, bringing changes in the weather as they move Weather systems are associated to the motion of large air masses 1.
(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))) (. .)))