A president may order a (security upgrade).Logical formLearned from7 sentences. An upgrade can be in years.Logical formLearned from7 sentences. Review can be for an upgrade.Logical formLearned from7 sentences. An utility may promise an upgrade.Logical formLearned from7 sentences. Details may pertain-to an upgrade.Logical formLearned from7 sentences. An upgrade may pertain-to services.Logical formLearned from6 sentences. An upgrade can be constituted-of-or-filled-with infrastructure.Logical formLearned from6 sentences. Languages can be without (software upgrades).Logical formLearned from6 sentences. Upgrades can be to a website.Logical formLearned from6 sentences. Upgrades may be supported.Logical formLearned from6 sentences. Upgrades can be gradual.Logical formLearned from6 sentences. An upgrade may be carry_outed.Logical formLearned from6 sentences. An upgrade may pertain-to a (rail line).Logical formLearned from6 sentences. An upgrade can be for computers.Logical formLearned from6 sentences. Upgrades may be provided.Logical formLearned from6 sentences.