(Navy frigates) may get to a scene.Logical formLearned from7 sentences. Island may be guarded by some frigates.Logical formLearned from7 sentences. Some (navy frigates) can be full of troops.Logical formLearned from7 sentences. A frigate can be multipurpose.Logical formLearned from7 sentences. A (navy frigate) may join a country.Logical formLearned from7 sentences. A frigate may shadow a (protest ship) on a voyage to a nuclear-test site.Logical formLearned from7 sentences. A frigate may be docked.Logical formLearned from7 sentences. A frigate may carry a helicopter.Logical formLearned from7 sentences. A (navy frigate) may carry a doctor.Logical formLearned from7 sentences. Frigates may be used.Logical formLearned from7 sentences. Frigates may be equipped with missiles.Logical formLearned from7 sentences. A country may order some frigates from a country.Logical formLearned from7 sentences. A frigate may sail.Logical formLearned from6 sentences. A (guided-missile frigate) may pertain-to a country.Logical formLearned from6 sentences. A frigate can be modified.Logical formLearned from6 sentences.