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))) (. .)))
It is possible history repeats itself.
( It ( ( is ( possible ( history ( repeats itself ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (ADJP (JJ possible) (SBAR (S (NP (NN history)) (VP (VBZ repeats) (NP (PRP itself))))))) (. .)))