i can believe i can believe that
( i ( can ( believe ( i ( can ( believe that ) ) ) ) ) )
(ROOT (S (NP (FW i)) (VP (MD can) (VP (VB believe) (SBAR (S (NP (FW i)) (VP (MD can) (VP (VB believe) (NP (DT that))))))))))
It's hard to make sense of the facts otherwise.
( It ( ( 's ( hard ( to ( ( make ( sense ( of ( the facts ) ) ) ) otherwise ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (ADJP (JJ hard) (S (VP (TO to) (VP (VB make) (NP (NP (NN sense)) (PP (IN of) (NP (DT the) (NNS facts)))) (ADVP (RB otherwise))))))) (. .)))