(S (S (S (BASENP (DT The) (JJ main) (NN concern)) (VP (VBZ is) (NP (BASENP (DT the) (NN number)) (PP (IN of) (NP (BASENP (NNS citizens)) (SBAR (WHNP (WP who)) (S (VP (MD will) (VP (VB vote)))))))))) (COMMA ,) (SBAR (SBAR (IN as)) (S (BASENP (RB only) (DT a) (NN 40) (NN %) (NN turnout) (NN level)) (VP (VBZ is) (VP (VBN expected)))))) (PERIOD .))