'd have a hard time believing it was just coincidence 
(ROOT (S (VP (MD 'd) (VP (VB have) (NP (DT a) (JJ hard) (NN time)) (S (VP (VBG believing) (SBAR (S (NP (PRP it)) (VP (VBD was) (NP (RB just) (NN coincidence)))))))))))
(ROOT (S (VP (MD ) (VP (VB ) (NP (DT ) (JJ ) (NN )) (S (VP (VBG ) (SBAR (S (NP (PRP )) (VP (VBD ) (NP (RB ) (NN )))))))))))