(As the old saying goes, If you can't figure out who the fool is at the poker table, it's probably you. 
( -LRB- ( ( As ( ( the ( old saying ) ) goes ) ) ( , ( ( If ( you ( ( ca n't ) ( ( figure out ) ( who ( ( the fool ) ( is ( at ( the ( poker table ) ) ) ) ) ) ) ) ) ) ( , ( it ( ( ( 's probably ) you ) . ) ) ) ) ) ) )
(ROOT (S (-LRB- -LRB-) (SBAR (IN As) (S (NP (DT the) (JJ old) (NN saying)) (VP (VBZ goes)))) (, ,) (SBAR (IN If) (S (NP (PRP you)) (VP (MD ca) (RB n't) (VP (VB figure) (PRT (RP out)) (SBAR (WHNP (WP who)) (S (NP (DT the) (NN fool)) (VP (VBZ is) (PP (IN at) (NP (DT the) (NN poker) (NN table)))))))))) (, ,) (NP (PRP it)) (VP (VBZ 's) (ADVP (RB probably)) (NP (PRP you))) (. .)))
If you can't figure out who the fool playing is, it's probably you.
( ( If ( you ( ( ca n't ) ( ( figure out ) ( who ( ( the ( fool playing ) ) is ) ) ) ) ) ) ( , ( it ( ( ( 's probably ) you ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP you)) (VP (MD ca) (RB n't) (VP (VB figure) (PRT (RP out)) (SBAR (WHNP (WP who)) (S (NP (DT the) (NN fool) (NN playing)) (VP (VBZ is)))))))) (, ,) (NP (PRP it)) (VP (VBZ 's) (ADVP (RB probably)) (NP (PRP you))) (. .)))