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))))))))))))) (. .) ('' '')))
They simply assumed that he'd made a mistake.
( They ( simply ( ( assumed ( that ( he ( 'd ( made ( a mistake ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (PRP They)) (ADVP (RB simply)) (VP (VBD assumed) (SBAR (IN that) (S (NP (PRP he)) (VP (VBD 'd) (VP (VBN made) (NP (DT a) (NN mistake))))))) (. .)))