These people are living proof that your investment pays off.
( ( These people ) ( ( are ( ( living proof ) ( that ( ( your investment ) ( pays off ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS people)) (VP (VBP are) (VP (VBG living) (NP (NN proof)) (SBAR (IN that) (S (NP (PRP$ your) (NN investment)) (VP (VBZ pays) (PRT (RP off))))))) (. .)))
The people are proof that the investment is worth it.
( ( The people ) ( ( are ( proof ( that ( ( the investment ) ( is ( worth it ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS people)) (VP (VBP are) (NP (NP (NN proof)) (SBAR (IN that) (S (NP (DT the) (NN investment)) (VP (VBZ is) (ADJP (JJ worth) (NP (PRP it)))))))) (. .)))