Frigates may pertain-to a period.Logical formLearned from3 sentences. A frigate can be with some men.Logical formLearned from3 sentences. Frigates can be steam-powered.Logical formLearned from3 sentences. A frigate may depart a US-city.Logical formLearned from3 sentences. A frigate may join a squadron.Logical formLearned from3 sentences. Frigates may pertain-to a navy.Logical formLearned from3 sentences. (-class frigates) may pertain-to a US-city.Logical formLearned from3 sentences. An itinerary may pertain-to a frigate.Logical formLearned from3 sentences. A frigate can be at a US-city.Logical formLearned from3 sentences. A frigate may set sail.Logical formLearned from3 sentences. A male can be first lieutenant of a frigate.Logical formLearned from3 sentences. A frigate can be in port.Logical formLearned from3 sentences. Frigates can be under construction.Logical formLearned from3 sentences. A male can be a frigate.Logical formLearned from3 sentences. A frigate may return to a country.Logical formLearned from3 sentences.