A certificate may pertain-to an (air operator).Logical formLearned from11 sentences. Operators may undergo qualifications.Logical formLearned from11 sentences. An operator can be in an industry.Logical formLearned from11 sentences. An operator can be on the ground.Logical formLearned from11 sentences. Operators can be constituted-of-or-filled-with excursions.Logical formLearned from11 sentences. Chairman may pertain-to an operator.Logical formLearned from11 sentences. Outrage can be against an operator.Logical formLearned from11 sentences. Operators may take_over a bulk of a (pork production).Logical formLearned from11 sentences. An operator may sit.Logical formLearned from11 sentences. An operator can be serious.Logical formLearned from11 sentences. Operators can be constituted-of-or-filled-with (radio stations).Logical formLearned from11 sentences. An operator can be held.Logical formLearned from11 sentences. A (shopping mall operator) may pertain-to a nation.Logical formLearned from11 sentences. Operators may pertain-to a dam.Logical formLearned from11 sentences. A (telecommunications operator) can be state-controlled.Logical formLearned from11 sentences.