( ( ( The ( three types ) ) ( of ( galaxies ( , ( S ( , ( ( N and ) Q-galaxies ) ) ) ) ) ) ) ( , ( ( may ( be ( proof ( of ( a ( cosmic ( decreasing gravity ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (CD three) (NNS types)) (PP (IN of) (NP (NNP galaxies) (, ,) (NNP S) (, ,) (NNP N) (CC and) (NNP Q-galaxies)))) (, ,) (VP (MD may) (VP (VB be) (NP (NP (NN proof)) (PP (IN of) (NP (DT a) (JJ cosmic) (VBG decreasing) (NN gravity)))))) (. .)))
The three types of galaxies, S, N and Q-galaxies, may be proof of a cosmic decreasing gravity.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD three) (NNS types)) (PP (IN of) (NP (NNS galaxies))))) (. .)))