( ( ( ( 250-66 million ) years ) ago ) . )
(ROOT (FRAG (ADVP (NP (QP (CD 250-66) (CD million)) (NNS years)) (RB ago)) (. .)))
250-66 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))))) (. .)))