( ( HOW ( CLOUDS ( ARE ( FORMED Clouds ) ) ) ) ( ( are ( ( masses ( of ( water ( droplets ( or ( ice crystals ) ) ) ) ) ) ( that ( are ( suspended ( in ( the air ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP HOW) (NNP CLOUDS) (NNP ARE) (NNP FORMED) (NNP Clouds)) (VP (VBP are) (NP (NP (NNS masses)) (PP (IN of) (NP (NN water) (NNS droplets) (CC or) (NN ice) (NNS crystals))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN suspended) (PP (IN in) (NP (DT the) (NN air))))))))) (. .)))
HOW CLOUDS ARE FORMED Clouds are masses of water droplets or ice crystals that are suspended in the air.
(ROOT (S (NP (NNS Clouds)) (VP (VBP are) (VP (VBN formed) (PP (IN from) (NP (NN water) (NNS droplets))))) (. .)))