(S (S (S (BASENP (DT The) (NN airport)) (VP (VBD remained) (ADJP (JJ open)))) (SBAR (IN while) (S (BASENP (DT the) (NN plane)) (VP (VBD was) (VP (VP (VBN dealt) (PP (IN with))) (PP (IN on) (BASENP (DT an) (NN emergency) (NN runway)))))))) (PERIOD .))