(S (S (BASENP (DT The) (NN plane)) (VP (VP (VBD crashed) (PP (ADVP (RB just)) (PP (IN outside) (BASENP (DT the) (NN airport))))) (COMMA ,) (SBAR (IN while) (PP (IN on) (NP (BASENP (JJ final) (NN approach)) (PP (TO to) (BASENP (NN land)))))))) (PERIOD .))