( Rain ( ( is ( ( liquid precipitation ) ( in ( ( the form ) ( of ( water drops ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Rain)) (VP (VBZ is) (NP (NP (JJ liquid) (NN precipitation)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NN water) (NNS drops))))))) (. .)))
Rain is liquid precipitation in the form of water drops.
(ROOT (S (NP (NN Rain)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (JJ liquid) (NN water))))) (. .)))