A country may protest over sales of some frigates.Logical formLearned from3 sentences. A frigate may steam to an area.Logical formLearned from3 sentences. A batch can be constituted-of-or-filled-with frigates.Logical formLearned from3 sentences. A frigate may violate territory.Logical formLearned from3 sentences. A frigate can be offshore.Logical formLearned from3 sentences. A frigate may sail to a site.Logical formLearned from3 sentences. A frigate may leave a country.Logical formLearned from3 sentences. Observers can be from a frigate.Logical formLearned from3 sentences. (Navy spokesman) may tell reporters on a frigate.Logical formLearned from3 sentences. A frigate can be unarmed.Logical formLearned from3 sentences. An order can be for some frigates.Logical formLearned from3 sentences. Some (stealth frigates) may be built.Logical formLearned from2 sentences. Frigates can be with features.Logical formLearned from2 sentences. A frigate may capture some pirates.Logical formLearned from2 sentences. Suspects may approach a frigate to guard.Logical formLearned from2 sentences.