(S (S (S (SBAR (IN While) (S (BASENP (JJ previous) (NNS studies)) (VP (VBD showed) (NP (BASENP (NN resistance) (NNS levels)) (PP (IN below) (BASENP (NN 1) (NN %))))))) (COMMA ,) (S (NP (BASENP (NNS samples)) (VP (VBN tested) (PP (IN by) (NP (BASENP (DT the) (NNP U.S.) (NNPS Centers)) (PP (IN for) (NP (NNP Disease) (BASENP (NNP Control) (CC and) (NNP Prevention)))))))) (VP (ADVP (RB now)) (VP (VBD showed) (NP (BASENP (QP (RB around) (NN 5)) (NN %)) (NN resistance)))))) (CONJP (COMMA ,) (CC and)) (S (PP (IN in) (NP (BASENP (DT a) (JJ Canadian) (NN survey)) (PP (IN of) (BASENP (NN 81) (NNS samples))))) (COMMA ,) (S (BASENP (NN 8)) (VP (VBD showed) (BASENP (NN resistance)))))) (PERIOD .))