(S (S (NP (BASENP (NN Two) (NNS scientists)) (VP (VBG working) (PP (IN at) (NP (BASENP (NNP McGill) (NNP University)) (PP (IN in) (BASENP (NNP Canada))))))) (VP (PRN (COMMA ,) (S (VP (VBG reporting) (PP (IN on) (NP (BASENP (PRPD their) (NN research)) (CC and) (NP (BASENP (DT the) (NN research)) (PP (IN of) (BASENP (JJ other) (NNS scientists)))))))) (COMMA ,)) (VP (VP (VBP state) (PP (IN in) (BASENP (NNP Scientific) (NNP American)))) (SBAR (IN that) (S (BASENP (NN Vitamin) (NN D)) (VP (MD may) (VP (VP (VP (VB have) (BASENP (JJ many) (NNS uses))) (PP (IN in) (BASENP (DT the) (JJ human) (NN body)))) (PP (IN besides) (S (VP (VBG building) (BASENP (JJ strong) (NNS bones)))))))))))) (PERIOD .))