(S (S (S (BASENP (QP (JJ Several) (NN hundred)) (NNS people)) (VP (VBD protested) (PP (IN at) (NP (NP (BASENP (JJ alleged) (NNS irregularities)) (PP (IN in) (BASENP (DT the) (NNS polls)))) (PP (IN on) (NP (BASENP (DT the) (NN 18th)) (PP (IN of) (BASENP (NNP July))))))))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBD ended) (PP (IN in) (S (BASENP (NN 7) (NNS people)) (VP (VBG being) (VP (VBN killed) (PP (IN in) (BASENP (NN police) (NNS clashes))))))))))) (PERIOD .))