(S (S (PP (IN As) (PP (IN of) (BASENP (NN press) (NN time)))) (COMMA ,) (S (S (NP (BASENP (DT the) (NN mouth)) (PP (IN of) (BASENP (DT the) (NN canyon)))) (VP (VBD was) (VP (VBN reopened) (PP (TO to) (BASENP (NN traffic)))))) (COMMA ,) (SBAR (IN while) (S (NP (BASENP (NN traffic)) (PP (IN at) (BASENP (DT the) (NN accident) (NN site)))) (VP (VBD was) (UCP (ADJP (JJ impassible)) (CONJP (COMMA ,) (CC and)) (VP (VBN rerouted) (ADVP (RB nearby))))))))) (PERIOD .))