A person may call_up stairs.Logical formLearned from4 sentences. Stairs may pertain-to a slide.Logical formLearned from4 sentences. A person may take_up stairs.Logical formLearned from4 sentences. A person may vacuum stairs.Logical formLearned from4 sentences. A female may walk_down stairs from a stage.Logical formLearned from4 sentences. A person may mean stairs.Logical formLearned from4 sentences. Stairs may be designated.Logical formLearned from4 sentences. A male may negotiate stairs.Logical formLearned from4 sentences. Stairs may add to an uniqueness.Logical formLearned from4 sentences. Narrow stairs can be by cab.Logical formLearned from4 sentences. A male may head_up a flight of stairs.Logical formLearned from4 sentences. A male may storm_up stairs.Logical formLearned from4 sentences. A person may rush_up stairs.Logical formLearned from4 sentences. Stairs may be made.Logical formLearned from4 sentences. A person may get_down stairs to the right.Logical formLearned from4 sentences.