(S (S (NP (BASENP (JJ Low) (NNS clouds)) (CC and) (BASENP (JJ heavy) (NN rain))) (VP (VBD were) (VP (VBN reported) (PP (IN at) (NP (BASENP (DT the) (NN time)) (PP (IN of) (BASENP (DT the) (NN crash)))))))) (PERIOD .))