( ( JEFF ( ERICKSON This ) ) ( ( is ( ( the ( three ( major types ) ) ) ( of galaxies ) ) ) . ) )
(ROOT (S (NP (NNP JEFF) (NNP ERICKSON) (NNP This)) (VP (VBZ is) (NP (NP (DT the) (CD three) (JJ major) (NNS types)) (PP (IN of) (NP (NNS galaxies))))) (. .)))
JEFF ERICKSON This is the three major types of galaxies.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD three) (NNS types)) (PP (IN of) (NP (NNS galaxies))))) (. .)))