Stairs can be into a basement.Logical formLearned from2 sentences. Stairs may be concealed by a jukebox.Logical formLearned from2 sentences. Stairs can be padded.Logical formLearned from2 sentences. Stairs can be at a (company headquarters).Logical formLearned from2 sentences. Gates may be mounted on a stretch of stairs.Logical formLearned from2 sentences. A stair can be elliptical.Logical formLearned from2 sentences. A person may negotiate some flights of stairs.Logical formLearned from2 sentences. Stairs can be a challenge.Logical formLearned from2 sentences. Stairs can be at a station.Logical formLearned from2 sentences. Stairs may crisscross a void.Logical formLearned from2 sentences. A stair may shoot_up through an atrium.Logical formLearned from2 sentences. Trouble may walk on stairs.Logical formLearned from2 sentences. Stairs may carry shoes.Logical formLearned from2 sentences. (Fire tower stairs) may be used in skyscrapers.Logical formLearned from2 sentences. A note may have stairs.Logical formLearned from2 sentences.