The doctor accepted quite readily the theory that Mrs. Vandemeyer had accidentally taken an overdose of chloral.
( ( The doctor ) ( ( ( ( accepted ( quite readily ) ) ( the theory ) ) ( that ( ( Mrs. Vandemeyer ) ( ( had accidentally ) ( taken ( ( an overdose ) ( of chloral ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN doctor)) (VP (VBD accepted) (ADVP (RB quite) (RB readily)) (NP (DT the) (NN theory)) (SBAR (IN that) (S (NP (NNP Mrs.) (NNP Vandemeyer)) (VP (VBD had) (ADVP (RB accidentally)) (VP (VBN taken) (NP (NP (DT an) (NN overdose)) (PP (IN of) (NP (NN chloral))))))))) (. .)))
The doctor believed that the theory was correct.
( ( The doctor ) ( ( believed ( that ( ( the theory ) ( was correct ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN doctor)) (VP (VBD believed) (SBAR (IN that) (S (NP (DT the) (NN theory)) (VP (VBD was) (ADJP (JJ correct)))))) (. .)))