(Sea wrecks) may pertain-to the world.Logical formLearned from4 sentences. (Deepwater sea wrecks) may pertain-to the world.Logical formLearned from4 sentences. A stern may pertain-to a wreck.Logical formLearned from4 sentences. A wreck may set_off a (chain reaction) of investigations.Logical formLearned from4 sentences. A person may cover a (tourist dive) to a wreck.Logical formLearned from4 sentences. Frogmen may recover hundreds of bottles from a wreck.Logical formLearned from4 sentences. Banks can be a wreck.Logical formLearned from4 sentences. Some helicopters may fly over a site of a wreck.Logical formLearned from4 sentences. A limit can be at a time of a wreck.Logical formLearned from4 sentences. Some divers may plunge some feet to a wreck.Logical formLearned from4 sentences. A person may take pictures of a wreck.Logical formLearned from4 sentences. A wreck can be under layers of rock.Logical formLearned from4 sentences. A port may be filled with wrecks.Logical formLearned from4 sentences. A world-city can be a wreck.Logical formLearned from4 sentences. A wreck may pertain-to a (tanker nakhodka).Logical formLearned from4 sentences.