(S (S (BASENP (DT The) (JJ sub-orbital) (NN flight)) (VP (VP (VBD reached) (NP (BASENP (DT an) (NN altitude)) (PP (IN of) (BASENP (NN 300) (NN km))))) (CONJP (COMMA ,) (CC and)) (VP (VBZ is) (PP (IN on) (NP (BASENP (DT a) (NN traectory)) (PP (IN for) (BASENP (NN re-entry)))))))) (PERIOD .))