(S (S (SBAR (IN While) (S (NP (BASENP (NNS reports)) (PP (IN in) (BASENP (DT the) (NN media)))) (VP (VBP vary)))) (COMMA ,) (S (S (NP (QP (ADVP (RB up) (TO to)) (NN 18)) (NNS people)) (VP (VBD were) (VP (VBN arrested)))) (SBAR (WHADVP (WRB when)) (S (BASENP (PRP they)) (VP (VBD turned) (ADJP (JJ violent))))))) (PERIOD .))