(S (S (NP (NP (BASENP (JJ Illegal) (NN logging)) (PP (IN in) (BASENP (NNP Mexico)))) (CC and) (NP (NP (NP (BASENP (DT a) (NN lack)) (PP (IN of) (BASENP (NN milkweed)))) (PP (IN in) (BASENP (DT the) (NNP Midwest) (NNP United) (NNPS States)))) (SBAR (IN for) (S (BASENP (DT the) (NNS butterflies)) (VP (TO to) (VP (VP (VB lay) (BASENP (PRPD their) (NNS eggs))) (PRT (RP in)))))))) (VP (VBZ has) (VP (ADVP (RB also)) (VP (VBN taken) (NP (BASENP (DT a) (NN toll)) (PP (IN on) (NP (BASENP (DT the) (NNPS Monarchs) (POS ')) (NN population)))))))) (PERIOD .))