A male may go_up a flight of stairs.Logical formLearned from3 sentences. A person may reach to a bottom of stairs.Logical formLearned from3 sentences. A person may lie-flat at a bottom of stairs.Logical formLearned from3 sentences. A female may handle stairs.Logical formLearned from3 sentences. Persons may go_down stairs to a lobby.Logical formLearned from3 sentences. A woman may sit at a base of stairs.Logical formLearned from3 sentences. A brother may clatter_up stairs on hands.Logical formLearned from3 sentences. Persons may run_up some flights of stairs.Logical formLearned from3 sentences. A (sac fly) may pertain-to stairs.Logical formLearned from3 sentences. A female may head toward stairs.Logical formLearned from3 sentences. Stairs may undergo a creaking.Logical formLearned from3 sentences. A male may take stairs some steps.Logical formLearned from3 sentences. Stairs may pertain-to a house.Logical formLearned from3 sentences. A person may play on stairs.Logical formLearned from3 sentences. Stairs can be a hell.Logical formLearned from3 sentences.