They were so sure of themselves that they took it for granted he had made a mistake."
( They ( ( ( ( were ( so ( sure ( of themselves ) ) ) ) ( that ( they ( ( took it ) ( for ( granted ( he ( had ( made ( a mistake ) ) ) ) ) ) ) ) ) ) . ) '' ) )
(ROOT (S (NP (PRP They)) (VP (VBD were) (ADJP (RB so) (JJ sure) (PP (IN of) (NP (PRP themselves)))) (SBAR (IN that) (S (NP (PRP they)) (VP (VBD took) (NP (PRP it)) (SBAR (IN for) (S (VP (VBD granted) (SBAR (S (NP (PRP he)) (VP (VBD had) (VP (VBN made) (NP (DT a) (NN mistake))))))))))))) (. .) ('' '')))
He made a mistake but concealed it so it wasn't obvious.
( He ( ( ( ( made ( a mistake ) ) but ) ( ( concealed it ) ( so ( it ( ( was n't ) obvious ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VP (VBD made) (NP (DT a) (NN mistake))) (CC but) (VP (VBN concealed) (NP (PRP it)) (SBAR (IN so) (S (NP (PRP it)) (VP (VBD was) (RB n't) (ADJP (JJ obvious))))))) (. .)))