Marriage is an important institution.
( Marriage ( ( is ( an ( important institution ) ) ) . ) )
(ROOT (S (NP (NNP Marriage)) (VP (VBZ is) (NP (DT an) (JJ important) (NN institution))) (. .)))
Marriage is crucial to society.
( Marriage ( ( is ( crucial ( to society ) ) ) . ) )
(ROOT (S (NP (NNP Marriage)) (VP (VBZ is) (ADJP (JJ crucial) (PP (TO to) (NP (NN society))))) (. .)))