Upgrades can be in condition.Logical formLearned from8 sentences. An upgrade may pertain-to a refinery.Logical formLearned from8 sentences. Upgrades can be costly.Logical formLearned from8 sentences. Upgrades can be enough.Logical formLearned from8 sentences. A measure may pay for (transportation upgrades).Logical formLearned from8 sentences. Plants may postpone upgrades.Logical formLearned from8 sentences. An upgrade may pertain-to an (air traffic control system).Logical formLearned from8 sentences. An upgrade may reflect progress.Logical formLearned from8 sentences. A rest may go on upgrades.Logical formLearned from8 sentences. Advantage may pertain-to an upgrade.Logical formLearned from8 sentences. Upgrades can be to a computer.Logical formLearned from8 sentences. An upgrade can be in a history.Logical formLearned from8 sentences. An upgrade may pertain-to the world.Logical formLearned from8 sentences. Upgrades can be to platforms.Logical formLearned from8 sentences. Some round can be constituted-of-or-filled-with upgrades.Logical formLearned from8 sentences.