(S (S (BASENP (DT Some) (NNS reports)) (VP (VBP say) (SBAR (IN that) (S (NP (QP (ADVP (IN at) (JJS least)) (NN 20)) (NNS villages)) (VP (VBP have) (VP (VBN been) (VP (VBN destroyed)))))))) (PERIOD .))