(Missile frigates) can be in an upgrade.Logical formLearned from2 sentences. (Missile frigates) may be purchased from a country.Logical formLearned from2 sentences. A frigate may be hited by fire.Logical formLearned from2 sentences. Some (missile frigates) may belong to a military-or-other-action-organization.Logical formLearned from2 sentences. A frigate can be part of a multinational force.Logical formLearned from2 sentences. A frigate can be part of a (naval force).Logical formLearned from2 sentences. A frigate can be on a visit.Logical formLearned from2 sentences. Frigates may patroll an island.Logical formLearned from2 sentences. A frigate may hmnz orders.Logical formLearned from2 sentences. A country may send a frigate to sea.Logical formLearned from2 sentences. A frigate may cruise.Logical formLearned from2 sentences. A person may move a frigate.Logical formLearned from2 sentences. A (frigate purchase) can be for (cost reasons).Logical formLearned from2 sentences. A country may send some guided-missile frigates.Logical formLearned from2 sentences. Some frigates may participate in exercises.Logical formLearned from2 sentences.