( ( was ( ( ( Segnosaurus ( an Omnivore ) ) or ) ( Herbivore 3 ) ) ) . )
(ROOT (S (VP (VBD was) (NP (NP (NNP Segnosaurus) (DT an) (NNP Omnivore)) (CC or) (NP (NNP Herbivore) (CD 3)))) (. .)))
was Segnosaurus an Omnivore or Herbivore 3.
(ROOT (S (NP (NNS Mammals)) (VP (MD may) (RB either) (VP (VB be) (NP (NNS herbivores) (, ,) (NNS omnivores) (CC or) (NNS herbivores)))) (. .)))