( What ( ( works ( with ( ( ( one face ) , ) ( ( might not ) ( work ( with another ) ) ) ) ) ) . ) )
(ROOT (S (NP (WP What)) (VP (VBZ works) (PP (IN with) (NP (NP (CD one) (NN face)) (, ,) (VP (MD might) (RB not) (VP (VB work) (PP (IN with) (NP (DT another)))))))) (. .)))
What works with one face, might not work with 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)))) (. .)))