(S (S (BASENP (NN Insulin) (NN production)) (VP (VBZ has) (VP (VBN been) (VP (VP (VP (VBN discovered) (PP (IN in) (BASENP (DT the) (NN brain)))) (CC and) (VP (VBN linked) (PP (TO to) (NP (BASENP (NNP Alzheimer) (POS 's)) (NN disease))))) (COMMA ,) (S (VP (ADVP (RB potentially)) (VP (VBG changing) (SBAR (WHADVP (WRB how)) (S (BASENP (DT the) (NN illness)) (VP (VBZ is) (VP (VBN viewed) (CC and) (VBN treated)))))))))))) (PERIOD .))