( ( ( ( 250 million ) years ) ago ) ( 4 . ) )
(ROOT (FRAG (ADVP (NP (QP (CD 250) (CD million)) (NNS years)) (RB ago)) (NP (CD 4)) (. .)))
250 million years ago 4.
(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))))) (. .)))