He said the President signed off on that concept.
( He ( ( said ( ( the President ) ( ( signed off ) ( on ( that concept ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD said) (SBAR (S (NP (DT the) (NNP President)) (VP (VBD signed) (PRT (RP off)) (PP (IN on) (NP (DT that) (NN concept))))))) (. .)))
The President signed off on the concept, according to him.
( ( The President ) ( ( ( ( ( signed off ) ( on ( the concept ) ) ) , ) ( according ( to him ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP President)) (VP (VBD signed) (PRT (RP off)) (PP (IN on) (NP (DT the) (NN concept))) (, ,) (PP (VBG according) (PP (TO to) (NP (PRP him))))) (. .)))