the old saying goes , because it 's true 
(ROOT (S (NP (DT the) (JJ old) (NN saying)) (VP (VBZ goes) (, ,) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ 's) (ADJP (JJ true))))))))
(ROOT (S (NP (DT ) (JJ ) (NN )) (VP (VBZ ) (, ) (SBAR (IN ) (S (NP (PRP )) (VP (VBZ ) (ADJP (JJ ))))))))