( ( An herbivore ) ( ( is ( ( an animal ) ( that ( eats ( ( ( only plants ) and ) ( no meat ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NN herbivore)) (VP (VBZ is) (NP (NP (DT an) (NN animal)) (SBAR (WHNP (WDT that)) (S (VP (VBZ eats) (NP (NP (JJ only) (NNS plants)) (CC and) (NP (DT no) (NN meat)))))))) (. .)))
An herbivore is an animal that eats only plants and no meat.
(ROOT (S (NP (NNS Herbivores)) (VP (VBP are) (NP (NP (NNS heterotrophs)) (SBAR (WHNP (WDT that)) (S (VP (VBP eat) (NP (UCP (ADJP (JJ only)) (CC or) (ADVP (RB mainly))) (NNS plants))))))) (. .)))