(S (S (S (BASENP (NNP Lieberman)) (VP (VBD was) (NP (BASENP (DT the) (JJ Democratic) (NN vice) (JJ presidential) (NN candidate)) (ADVP (RB back) (PP (IN in) (BASENP (NN 2000))))))) (COMMA ,) (SBAR (WHADVP (WRB when)) (S (BASENP (PRP he)) (VP (VBD ran) (PP (IN with) (BASENP (NNP Al) (NNP Gore))))))) (PERIOD .))