( ( A heterotroph ) ( that ( eats ( only plants ) ) ) )
(ROOT (FRAG (NP (NP (DT A) (NN heterotroph)) (SBAR (WHNP (WDT that)) (S (VP (VBZ eats) (NP (JJ only) (NNS plants))))))))
A heterotroph that eats only plants
(ROOT (S (NP (DT The) (NN heterotroph)) (VP (VBZ eats) (NP (UCP (ADJP (JJ only)) (CC or) (ADVP (RB mainly))) (NNS plants))) (. .)))