Frigates may undergo a retention.Logical formLearned from2 sentences. Some frigates may be slated for retirement.Logical formLearned from2 sentences. A frigate may undergo a voyage.Logical formLearned from2 sentences. A fleet may consist of some (battle frigates).Logical formLearned from2 sentences. A frigate can be with an (iron nine-pounder).Logical formLearned from2 sentences. A frigate may pertain-to (board captain).Logical formLearned from2 sentences. A (missile attack) can be on a frigate.Logical formLearned from2 sentences. A frigate may be anchored.Logical formLearned from2 sentences. A contract can be for frigates.Logical formLearned from2 sentences. Some frigates can be in a navy.Logical formLearned from2 sentences. A sound may be originated from a frigate.Logical formLearned from2 sentences. Frigates may undergo a building.Logical formLearned from2 sentences. A frigate may undergo a liberation.Logical formLearned from2 sentences. A frigate may be completed.Logical formLearned from2 sentences. A commander may order a frigate.Logical formLearned from2 sentences.