(S (S (NP (BASENP (JJ Global) (NN warming) (NN campaigner)) (CC and) (BASENP (JJ former) (NNP U.S.) (NNP Vice) (NNP President) (NNP Al) (NNP Gore))) (VP (VBZ says) (SBAR (S (BASENP (PRP it)) (VP (VBZ is) (NP (BASENP (NN time)) (SBAR (IN for) (S (BASENP (NN humanity)) (VP (TO to) (VP (VB stop) (NP (QT (DQL ``) (BASENP (JJ waging) (NN war)) (DQR '')) (PP (IN on) (BASENP (NN planet) (NNP Earth)))))))))))))) (PERIOD .))