(S (S (BASENP (DT The) (NNP U.S.)) (VP (VBZ claims) (SBAR (IN that) (S (BASENP (DT the) (JJ such) (NNS weapons)) (VP (VBP have) (VP (VBN killed) (NP (NP (QP (ADVP (IN at) (JJS least)) (NN 170)) (NNS troops)) (CC and) (NP (BASENP (DT a) (ADJP (RB much) (JJR higher)) (NN number)) (PP (IN of) (BASENP (JJ Iraqi) (NNS civilians))))))))))) (PERIOD .))