(S (S (S (BASENP (DT The) (NNP Cessna)) (VP (VBD had) (NP (NP (BASENP (NN one) (NN person)) (PP (IN on) (BASENP (NN board)))) (SBAR (WHNP (WP who)) (S (VP (ADVP (RB also)) (VBD died))))))) (CONJP (COMMA ,) (CC but)) (S (BASENP (PRPD its) (NN destination)) (VP (VP (VBZ is) (RB not)) (VP (ADVP (RB yet)) (VBN known))))) (PERIOD .))