(S (S (S (BASENP (DT All) (NN 12) (NNS firefighters)) (VP (VBP are) (VP (VBG being) (VP (VBN treated) (PP (IN at) (BASENP (NNP Erie) (NNP County) (NNP Medical) (NNP Center))))))) (CONJP (COMMA ,) (CC but)) (S (BASENP (PRPD their) (NNS conditions)) (VP (VP (VBP are) (RB not)) (VP (VBN known))))) (PERIOD .))