(S (S (S (BASENP (DT The) (NNS bacteria)) (VP (VP (VBP are) (RB not)) (ADJP (ADJP (RB very) (JJ harmful)) (PP (TO to) (BASENP (DT an) (JJ average) (NN person)))))) (CONJP (COMMA ,) (CC but)) (S (NP (BASENP (JJ many) (JJ sensitive) (NNS groups)) (PRN (COMMA ,) (PP (IN such) (PP (IN as) (NP (DT the) (NP (NP (BASENP (NN young)) (COMMA ,) (BASENP (NN sick))) (CC or) (BASENP (NN elderly)))))) (COMMA ,))) (VP (MD could) (VP (VB get) (ADJP (JJ sick) (PP (IN from) (BASENP (PRP it)))))))) (PERIOD .))