(S (S (BASENP (NNS Authorities)) (VP (VBP suggest) (SBAR (IN that) (S (BASENP (DT the) (NN strain)) (VP (VP (MD may) (RB not)) (VP (VB be) (ADJP (ADJP (RB as) (JJ deadly)) (PP (IN as) (BASENP (JJ first) (NN thought)))))))))) (PERIOD .))