( ( ( Jurassic 170 ) ( ( Ma ( MESOZOIC ( ERA Dominance ) ) ) ( of ( the dinosaurs ) ) ) ) . )
(ROOT (NP (NP (JJ Jurassic) (CD 170)) (NP (NP (NNP Ma) (NNP MESOZOIC) (NNP ERA) (NNP Dominance)) (PP (IN of) (NP (DT the) (NNS dinosaurs)))) (. .)))
Jurassic 170 Ma MESOZOIC ERA Dominance of the dinosaurs.
(ROOT (S (NP (NNS Dinosaurs)) (VP (VBD filled) (NP (DT the) (NNS niches)) (SBAR (IN that) (S (NP (NNS mammals)) (VP (VBP fill) (NP (NN today)) (PP (IN during) (NP (DT the) (JJ mesozoic) (NN era))))))) (. .)))