( ( ( The work ) ( of ( a scientist ) ) ) . )
(ROOT (NP (NP (DT The) (NN work)) (PP (IN of) (NP (DT a) (NN scientist))) (. .)))
The work of a scientist.
(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)))) (. .)))