( ( ( The ( vast majority ) ) ( of ( ( sexually ( active Catholics ) ) ( of ( childbearing age ) ) ) ) ) ( ( use ( artificial contraceptives ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ vast) (NN majority)) (PP (IN of) (NP (NP (RB sexually) (JJ active) (NNPS Catholics)) (PP (IN of) (NP (JJ childbearing) (NN age)))))) (VP (VBP use) (NP (JJ artificial) (NNS contraceptives))) (. .)))
The vast majority of sexually active Catholics of childbearing age use artificial contraceptives.
(ROOT (S (NP (NP (DT The) (JJ vast) (NN majority)) (PP (IN of) (NP (NN fish)))) (VP (VB reproduce) (ADVP (RB sexually))) (. .)))