( ( Seed dispersal ) ( ( is ( by wind ) ) . ) )
(ROOT (S (NP (NN Seed) (NN dispersal)) (VP (VBZ is) (PP (IN by) (NP (NN wind)))) (. .)))
Seed dispersal is by wind.
(ROOT (S (NP (NP (NNS Seeds)) (PP (IN of) (NP (DT a) (JJ pine) (NN cone)))) (VP (VP (VBP are) (ADVP (RB easily)) (VP (VBN carried) (PP (IN by) (NP (DT the) (NN wind))))) (CC and) (VP (VBD dispersed) (SBAR (IN because) (S (NP (NNS seeds)) (VP (VBP have) (NP (NNS wings))))))) (. .)))