(S (S (BASENP (DT The) (NN group)) (VP (VP (VBD called) (PP (IN for) (NP (BASENP (DT a) (NN boycott)) (PP (IN of) (BASENP (DT the) (NNS polls)))))) (CONJP (COMMA ,) (CC and)) (VP (VBD threatened) (NP (BASENP (NNS violence)) (PP (IN against) (NP (BASENP (NN anyone)) (SBAR (WHNP (WP who)) (S (VP (MD would) (VP (VB vote))))))))))) (PERIOD .))