What you say about Lawrence is a great surprise to me, I said. 
( ( What ( you ( say ( about ( Lawrence ( is ( ( a ( great surprise ) ) ( to me ) ) ) ) ) ) ) ) ( , ( I ( said . ) ) ) )
(ROOT (S (SBAR (WHNP (WP What)) (S (NP (PRP you)) (VP (VBP say) (SBAR (IN about) (S (NP (NNP Lawrence)) (VP (VBZ is) (NP (NP (DT a) (JJ great) (NN surprise)) (PP (TO to) (NP (PRP me)))))))))) (, ,) (NP (PRP I)) (VP (VBD said)) (. .)))
I think Lawrence is telling the truth, so what you say is a surprise.
( ( ( ( ( I ( think ( Lawrence ( is ( telling ( the truth ) ) ) ) ) ) , ) so ) ( ( what ( you say ) ) ( is ( a surprise ) ) ) ) . )
(ROOT (S (S (NP (PRP I)) (VP (VBP think) (SBAR (S (NP (NNP Lawrence)) (VP (VBZ is) (VP (VBG telling) (NP (DT the) (NN truth)))))))) (, ,) (IN so) (S (SBAR (WHNP (WP what)) (S (NP (PRP you)) (VP (VBP say)))) (VP (VBZ is) (NP (DT a) (NN surprise)))) (. .)))