(S (S (ADVP (RB Sometimes)) (S (BASENP (DT the) (NNS police)) (VP (VBP have) (VP (VBN forced) (S (BASENP (NNS homeowners)) (VP (TO to) (VP (VP (VP (VB carry) (PRT (RP out))) (BASENP (DT the) (NN destruction))) (BASENP (PRP themselves))))))))) (PERIOD .))