( ( ( Working ( with Scientists ) ) . ) . )
(ROOT (S (VP (VB Working) (PP (IN with) (NP (NNS Scientists))) (. .)) (. .)))
Working with Scientists..
(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)))) (. .)))