( Clouds ( ( form ( from ( droplets ( of ( water ( and ( tiny ( ice crystals ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Clouds)) (VP (VBP form) (PP (IN from) (NP (NP (NNS droplets)) (PP (IN of) (NP (NN water) (CC and) (JJ tiny) (NN ice) (NNS crystals)))))) (. .)))
Clouds form from droplets of water and tiny ice crystals.
(ROOT (S (NP (NNS Clouds)) (VP (VBP are) (VP (VBN formed) (PP (IN from) (NP (NN water) (NNS droplets))))) (. .)))