Elevators may replace stairs.Logical formLearned from2 sentences. Stairs can be rusted.Logical formLearned from2 sentences. A flight of stairs may throw himself.Logical formLearned from2 sentences. Stairs can be into a hospital.Logical formLearned from2 sentences. Officials may scurry_down some floors of stairs to safety.Logical formLearned from2 sentences. Stairs can be from an entrance.Logical formLearned from2 sentences. Guests may mount stairs.Logical formLearned from2 sentences. A boy may sprint_up stairs.Logical formLearned from2 sentences. Protesters may retreat_up stairs.Logical formLearned from2 sentences. A voice may come_up stairs.Logical formLearned from2 sentences. A gunman may run_up stairs.Logical formLearned from2 sentences. Stairs may wear an (ivory dress).Logical formLearned from2 sentences. Hundreds of flowers may line stairs to an entrance.Logical formLearned from2 sentences. Stairs can be with a stretcher.Logical formLearned from2 sentences. A 2-year-old can be stairs.Logical formLearned from2 sentences.