I guess history repeats itself, Jane.
( ( I ( guess history ) ) ( ( repeats ( ( itself , ) Jane ) ) . ) )
(ROOT (SINV (S (NP (PRP I)) (VP (VBP guess) (NP (NN history)))) (VP (VBZ repeats)) (NP (NP (PRP itself)) (, ,) (NP (NNP Jane))) (. .)))
History certainly doesn't repeat, Jane.
( History ( certainly ( ( ( does n't ) ( ( repeat , ) Jane ) ) . ) ) )
(ROOT (S (NP (NN History)) (ADVP (RB certainly)) (VP (VBZ does) (RB n't) (VP (VB repeat) (, ,) (ADVP (RB Jane)))) (. .)))