(S (S (PP (IN On) (BASENP (NNP Monday))) (COMMA ,) (S (BASENP (DT the) (JJ heavy) (NN rain)) (VP (VBD flooded) (NP (NP (BASENP (NN street)) (COMMA ,) (BASENP (NNS streams))) (CONJP (COMMA ,) (CC and)) (NP (BASENP (DT a) (NN sewage) (NN treatment) (NN plant)) (PP (IN in) (BASENP (NNP Iowa)))))))) (PERIOD .))