( Herbivores ( ( ( ( feed only ) ( on ( ( plants , ) ( carnivores ( on ( other ( ( animals and ) omnivores ) ) ) ) ) ) ) ( on ( both ( ( plants and ) animals ) ) ) ) . ) )
(ROOT (S (NP (NNS Herbivores)) (VP (VBP feed) (ADVP (RB only)) (PP (IN on) (NP (NP (NNS plants)) (, ,) (NP (NP (NNS carnivores)) (PP (IN on) (NP (JJ other) (NNS animals) (CC and) (NNS omnivores)))))) (PP (IN on) (NP (DT both) (NNS plants) (CC and) (NNS animals)))) (. .)))
Herbivores feed only on plants, carnivores on other animals and omnivores on both plants and animals.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT an) (NN animal)) (SBAR (WHNP (WDT that)) (S (VP (VBZ feeds) (PP (IN on) (NP (NP (JJ other) (NNS animals)) (SBAR (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-)) (VP (VBP carnivore))))))))))) (. .)))