( ( What ( works ( for ( one person ) ) ) ) ( ( ( might not ) ( work ( for another ) ) ) . ) )
(ROOT (S (SBAR (WHNP (WP What)) (S (VP (VBZ works) (PP (IN for) (NP (CD one) (NN person)))))) (VP (MD might) (RB not) (VP (VB work) (PP (IN for) (NP (DT another))))) (. .)))
What works for one person might not work for another.
(ROOT (S (S (VP (TO To) (VP (VB confirm) (NP (NP (DT the) (NN work)) (PP (IN of) (NP (DT another) (NN scientist))))))) (, ,) (NP (DT a) (NN scientist)) (VP (MD might) (VP (VB replicate) (NP (PRP$ their) (NN work)))) (. .)))