(S (S (BASENP (DT An) (NNP Asiana) (NNPS Airlines) (NNP Boeing) (NN 777) (NN airplane)) (VP (VP (VP (VBD crashed) (PP (IN upon) (S (VP (VBG landing) (PP (IN at) (BASENP (NNP San) (NNP Francisco) (NNP International) (NNP Airport))))))) (NP (BASENP (RB around) (NN 11:30) (NN AM)) (BASENP (JJ local) (NN time)))) (BASENP (NN today)))) (PERIOD .))