Operators can be constituted-of-or-filled-with unmanned aircraft.Logical formLearned from20 sentences. Operators of a (commuter train) may blame an engineer.Logical formLearned from20 sentences. A (tour operator) may go bust.Logical formLearned from20 sentences. Operators can be reputable.Logical formLearned from20 sentences. A (casino operator) may pertain-to a US-city.Logical formLearned from20 sentences. A right may pertain-to an operator.Logical formLearned from20 sentences. Operators can be based.Logical formLearned from20 sentences. Operators can be specialized.Logical formLearned from20 sentences. Algebras can be constituted-of-or-filled-with operators.Logical formLearned from20 sentences. A query may use operators.Logical formLearned from20 sentences. Operators can be in a US-city.Logical formLearned from20 sentences. An operator may pertain-to an electrical grid.Logical formLearned from20 sentences. Some (takeover bid) can be for (cable tv operator).Logical formLearned from20 sentences. An operator may oversee a (power grid).Logical formLearned from20 sentences. A stake can be in mobile operator.Logical formLearned from20 sentences.