A person may have erection.Logical formLearned from8 sentences. Mills may undergo an erection.Logical formLearned from7 sentences. A plaque may undergo an erection.Logical formLearned from7 sentences. A state can be constituted-of-or-filled-with erection.Logical formLearned from7 sentences. A library may undergo an erection.Logical formLearned from7 sentences. Skyscrapers may undergo an erection.Logical formLearned from7 sentences. A hotel may undergo an erection.Logical formLearned from7 sentences. Facilities may undergo an erection.Logical formLearned from7 sentences. Walls may undergo an erection.Logical formLearned from7 sentences. A flagpole may undergo an erection.Logical formLearned from7 sentences. Species may undergo an erection.Logical formLearned from7 sentences. An erection can be artificial.Logical formLearned from7 sentences. (Steel structures) may undergo an erection.Logical formLearned from7 sentences. Temples may undergo an erection.Logical formLearned from7 sentences. An engine may undergo an erection.Logical formLearned from7 sentences.