HE KNOWS ABOUT THE MINES.
( HE ( ( KNOWS ( ABOUT ( THE MINES ) ) ) . ) )
(ROOT (S (NP (PRP HE)) (VP (VBZ KNOWS) (VP (VB ABOUT) (NP (DT THE) (NNS MINES)))) (. .)))
He told me about the gold mines. 
( He ( ( ( told me ) ( about ( the ( gold mines ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD told) (NP (PRP me)) (PP (IN about) (NP (DT the) (JJ gold) (NNS mines)))) (. .)))