         ‘Séntence 1; iiigré'td the point,’ even as the major airlines  have .been* reaping. laige’ profits: ove? the. last four: years,  theie ‘productivity'-has nat -risén at ‘all, suggesting “that  consolidation is not improving efficiency.    Sentence: 2: ‘Airlines don't prodace much brane ‘but nave  becgme. highly productive. -    