( ( 10.2 ( CLOUD FORMATION ) ) ( ( Since ( clouds ( are ( composed ( of ( ( ( water droplets ) or ) ( ( solid particles ) ( suspended ( in ( the ( atmosphere ( , ( ( condensation or ) sublimation ) ) ) ) ) ) ) ) ) ) ) ) ) ( ( must ( occur ( for ( them ( to form ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP 10.2) (NNP CLOUD) (NNP FORMATION)) (SBAR (IN Since) (S (NP (NNS clouds)) (VP (VBP are) (VP (VBN composed) (PP (IN of) (NP (NP (NN water) (NNS droplets)) (CC or) (NP (NP (JJ solid) (NNS particles)) (VP (VBN suspended) (PP (IN in) (NP (DT the) (NN atmosphere) (, ,) (NN condensation) (CC or) (NN sublimation))))))))))) (VP (MD must) (VP (VB occur) (SBAR (IN for) (S (NP (PRP them)) (VP (TO to) (VP (VB form))))))) (. .)))
10.2 CLOUD FORMATION Since clouds are composed of water droplets or solid particles suspended in the atmosphere, condensation or sublimation must occur for them to form.
(ROOT (S (NP (NNP Condensation)) (VP (MD must) (VP (VB occur) (PP (IN for) (NP (NNS clouds))) (S (VP (TO to) (VP (VB form)))))) (. .)))