( Reptiles ( ( developed ( the ( first ( amniote ( egg 18 ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Reptiles)) (VP (VBD developed) (NP (DT the) (JJ first) (NN amniote) (NN egg) (CD 18))) (. .)))
Reptiles developed the first amniote egg 18.
(ROOT (S (NP (DT The) (JJ amniotic) (NN egg)) (ADVP (RB first)) (VP (VBD evolved) (PP (IN in) (NP (NNS reptiles)))) (. .)))