Masts may undergo an erection.Logical formLearned from4 sentences. An erection can be planned.Logical formLearned from4 sentences. An (exhibition building) may undergo an erection.Logical formLearned from4 sentences. Erections can be embarrassing.Logical formLearned from4 sentences. Equipment may undergo an erection.Logical formLearned from4 sentences. A superstructure may undergo an erection.Logical formLearned from4 sentences. An erection may end.Logical formLearned from4 sentences. Homes may undergo an erection.Logical formLearned from4 sentences. Erection may begin.Logical formLearned from4 sentences. A home may undergo an erection.Logical formLearned from4 sentences. A deity can be with erection.Logical formLearned from4 sentences. A public building may undergo an erection.Logical formLearned from4 sentences. Erections can be firm.Logical formLearned from4 sentences. A stele may undergo an erection.Logical formLearned from4 sentences. Turbines may undergo an erection.Logical formLearned from4 sentences.