( ( ( Mesozoic ( The ( geological era ) ) ) ( beginning ( ( ( about ( 250 million ) ) years ) ago ) ) ) . )
(ROOT (NP (NP (JJ Mesozoic) (DT The) (JJ geological) (NN era)) (VP (VBG beginning) (ADVP (NP (QP (RB about) (CD 250) (CD million)) (NNS years)) (RB ago))) (. .)))
Mesozoic The geological era beginning about 250 million years ago.
(ROOT (S (NP (NNP Pangaea)) (VP (VBD began) (S (VP (VBG breaking) (ADVP (RB apart)) (ADVP (NP (QP (CD 250) (CD million)) (NNS years)) (RB ago))))) (. .)))