(S (S (BASENP (NNP Airbus)) (VP (VBZ has) (VP (VBN warned) (SBAR (S (BASENP (EX there)) (VP (MD could) (VP (VB be) (NP (BASENP (JJ additional) (NNS charges)) (SBAR (S (VP (TO to) (VP (VB come))))))))))))) (PERIOD .))