An upgrade may pertain-to an (operating system).Logical formLearned from56 sentences. Variety can be constituted-of-or-filled-with upgrades.Logical formLearned from55 sentences. Upgrades can be paid.Logical formLearned from54 sentences. An upgrade may pertain-to a country.Logical formLearned from53 sentences. An upgrade can be official.Logical formLearned from51 sentences. An upgrade may pertain-to a line.Logical formLearned from51 sentences. Upgrades can be simple.Logical formLearned from51 sentences. An upgrade may undergo a completion.Logical formLearned from51 sentences. An upgrade can be to a version.Logical formLearned from51 sentences. Upgrades can be electronic.Logical formLearned from49 sentences. Upgrades can be daily.Logical formLearned from49 sentences. An upgrade can be in materials.Logical formLearned from49 sentences. A male can be an upgrade.Logical formLearned from49 sentences. An upgrade can be free.Logical formLearned from49 sentences. An upgrade may pertain-to a network.Logical formLearned from48 sentences.