( ( the scientists ) ( ( working ( on it ) ) ; ) )
(ROOT (S (NP (DT the) (NNS scientists)) (VP (VBG working) (PP (IN on) (NP (PRP it)))) (: ;)))
the scientists working on it;
(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)))) (. .)))