(S (S (PP (IN Since) (S (VP (VP (VP (VBG leaving) (BASENP (NN office))) (PP (IN in) (BASENP (NN 2003)))) (PP (IN due) (PP (TO to) (BASENP (NN term) (NNS limits))))))) (COMMA ,) (S (BASENP (PRP he)) (VP (VP (VBZ has) (VP (VP (VBN advocated) (PP (IN for) (BASENP (NN marijuana) (NN legalization)))) (COMMA ,) (VP (VBD climbed) (BASENP (NNP Mount) (NNP Everest))))) (CONJP (COMMA ,) (CC and)) (VP (VBZ has) (VP (VBN entered) (PP (IN into) (BASENP (JJ presidential) (NN politics)))))))) (PERIOD .))