(S (S (BASENP (NNS Investigators)) (VP (VBP say) (SBAR (S (NP (NP (QP (ADVP (IN at) (JJS least)) (NN 33)) (BASENP (JJ specific) (NNS films) (CC and) (NNS songs))) (VP (VBN posted) (PP (IN on) (BASENP (NNP TPB))))) (VP (VBD were) (VP (VBN tracked) (PP (IN by) (BASENP (NNS authorities))))))))) (PERIOD .))