(S (S (BASENP (PRP She)) (VP (VBD became) (NP (BASENP (DT the) (JJ first) (VBN known) (NN person)) (SBAR (S (VP (TO to) (VP (VP (VB recover) (PP (IN from) (BASENP (DT the) (NN disease)))) (PP (IN without) (BASENP (NN vaccination)))))))))) (PERIOD .))