Complex sentence: Maetel is at a loss for words but a government spokeswoman inserts herself into their conversation and begins giving answers on Maetel's behalf, which outrages Tetsuro even more and he storms off in a blind fury.
Split into simpler sentences: Maetel is at a loss for words, but a government spokeswoman inserts herself into their conversation and begins giving answers on Maetel's behalf. Tetsuro is not impressed and he storms off in a blind fury.