(S (S (S (BASENP (DT The) (NN crowd)) (VP (VBD dispersed))) (SBAR (IN after) (S (BASENP (DT the) (NNS police)) (VP (VBD threatend) (NP (BASENP (JJ several) (NNS times)) (S (VP (TO to) (VP (VP (VB clear) (BASENP (DT the) (NN crossing))) (PP (IN by) (BASENP (NN force))))))))))) (PERIOD .))