An upgrade may pertain-to a (railway network).Logical formLearned from5 sentences. An upgrade may be launched.Logical formLearned from5 sentences. Upgrades may be introduced.Logical formLearned from5 sentences. An upgrade can be to a country.Logical formLearned from5 sentences. Upgrades can be throughout a building.Logical formLearned from5 sentences. Upgrade can be to status.Logical formLearned from5 sentences. A show may be included in an upgrade.Logical formLearned from5 sentences. An upgrade can be in beast.Logical formLearned from5 sentences. Upgrades can be to a model.Logical formLearned from5 sentences. Upgrades can be to an arena.Logical formLearned from5 sentences. Upgrades can be for some (model year).Logical formLearned from5 sentences. An upgrade can be for a family.Logical formLearned from5 sentences. Upgrades may be installed.Logical formLearned from5 sentences. Upgrades may include suspension.Logical formLearned from5 sentences. Upgrades can be expensive.Logical formLearned from5 sentences.