(S (S (S (NP (BASENP (DT The) (NN history)) (PP (IN of) (BASENP (DT the) (NN riding)))) (VP (MD can) (VP (PRN (COMMA ,) (PP (IN in) (BASENP (DT some) (NN measure))) (COMMA ,)) (VP (VB be) (VP (VBN read) (PP (IN in) (NP (BASENP (DT the) (NNS parties)) (VP (VBG fielding) (BASENP (NNS candidates)))))))))) (COLON ;) (S (PP (IN in) (NP (BASENP (NN addition)) (PP (TO to) (BASENP (DT the) (NN four) (JJ national) (NNS parties))))) (S (NP (EX there)) (VP (VBP are) (NP (BASENP (NNS contestants)) (PP (IN from) (NP (NP (BASENP (NNP Libertarian)) (COMMA ,) (BASENP (NNP Communist))) (CONJP (COMMA ,) (CC and)) (BASENP (NNP Marxist-Leninist) (NNS parties))))))))) (PERIOD .))