(Liquid pipeline operators) can be hazardous.Logical formLearned from11 sentences. Operators can be tense.Logical formLearned from11 sentences. A majority may pertain-to operators.Logical formLearned from11 sentences. A person can be an operator.Logical formLearned from11 sentences. An operator can be physical.Logical formLearned from11 sentences. An operator may intervene.Logical formLearned from11 sentences. (Crane operators) may undergo a certification.Logical formLearned from11 sentences. A person may tell an operator that something-is-the-case.Logical formLearned from11 sentences. Operators can be interstate.Logical formLearned from11 sentences. Operators can be on a surface.Logical formLearned from11 sentences. A network may pertain-to operator.Logical formLearned from11 sentences. A (mine operator) may engage in conduct.Logical formLearned from11 sentences. The right may pertain-to an operator.Logical formLearned from11 sentences. Downwind may pertain-to a (shear operator).Logical formLearned from11 sentences. A size may pertain-to an operator.Logical formLearned from11 sentences.