(S (S (PP (VBG According) (PP (TO to) (BASENP (DT the) (NNP Federal) (NNP Aviation) (NNP Administration)))) (COMMA ,) (S (S (BASENP (DT the) (NNP Ted) (NNP Stevens) (NNP Anchorage) (NNP International) (NNP Airport)) (VP (VBD was) (VP (VBN shut) (PRT (RP down))))) (SBAR (IN after) (S (BASENP (NN ash)) (VP (VBD reached) (BASENP (DT the) (NN airport))))))) (PERIOD .))