(S (S (PP (IN On) (BASENP (NN average))) (COMMA ,) (S (BASENP (NN 33) (NNS civilians)) (VP (VBD were) (VP (VP (VBN killed) (PP (IN per) (BASENP (NN day)))) (PP (IN at) (NP (BASENP (DT the) (NN end)) (PP (IN of) (BASENP (NNP January))))))))) (PERIOD .))