(S (S (BASENP (NN Government) (NNS sources)) (VP (VBP have) (VP (VBN reported) (SBAR (IN that) (S (S (NP (QP (ADVP (IN at) (JJS least)) (NN six)) (NNS people)) (VP (VBP have) (VP (VBN been) (VP (VBN killed) (PP (IN by) (BASENP (NNS floodwaters))))))) (CONJP (COMMA ,) (CC and)) (S (BASENP (NN two) (NNS people)) (VP (VBD were) (VP (VBN crushed) (PP (IN by) (BASENP (DT a) (NN landslide))))))))))) (PERIOD .))