Firms may operate in countries.Logical formLearned from22 sentences. Some (oil companies) may operate in a country.Logical formLearned from22 sentences. Planes may operate.Logical formLearned from22 sentences. Sailors may operate in waters.Logical formLearned from21 sentences. A male may operate a ferry.Logical formLearned from21 sentences. Traders may operate.Logical formLearned from21 sentences. A male may operate a general store.Logical formLearned from21 sentences. Companies may operate in an area.Logical formLearned from21 sentences. A restaurant may operate.Logical formLearned from21 sentences. A male may operate a restaurant.Logical formLearned from21 sentences. A male may operate on a male.Logical formLearned from21 sentences. Some routes may be operated.Logical formLearned from21 sentences. A company may operate some supermarkets.Logical formLearned from21 sentences. Some lines may operate.Logical formLearned from21 sentences. A school-board may operate public schools.Logical formLearned from21 sentences.