(S (S (NP (NP (QP (ADVP (IN At) (JJS least)) (NN 80)) (NN %)) (PP (IN of) (NP (BASENP (NN those)) (VP (VBN suffering) (PP (IN from) (BASENP (DT the) (NN disease))))))) (VP (VBP have) (VP (VBN shown) (NP (BASENP (NN resistance)) (PP (TO to) (BASENP (JJ other) (NNS medications))))))) (PERIOD .))