(S (S (BASENP (DT The) (NN drug)) (VP (ADVP (RB also)) (VP (VBZ shows) (SBAR (IN that) (S (BASENP (PRP it)) (VP (VBZ works) (PP (IN on) (NP (NP (BASENP (NNS strains)) (PP (IN of) (BASENP (NN HIV)))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADJP (JJ resistant) (PP (TO to) (BASENP (JJ other) (NNS medications))))))))))))))) (PERIOD .))