A male may scale stairs.Logical formLearned from3 sentences. Stairs may be rope_offed.Logical formLearned from3 sentences. A sign can be on stairs.Logical formLearned from3 sentences. Stairs may groan.Logical formLearned from3 sentences. Toys may be left on stairs.Logical formLearned from3 sentences. Stairs may rise.Logical formLearned from3 sentences. A male may look_up at stairs.Logical formLearned from3 sentences. A male may stand at a head of stairs.Logical formLearned from3 sentences. A step can be on a stair.Logical formLearned from3 sentences. A male may stare at stairs.Logical formLearned from3 sentences. A male may rush_up stairs of a home.Logical formLearned from3 sentences. (Stage stairs) may undergo a placement.Logical formLearned from3 sentences. Students may use stairs.Logical formLearned from3 sentences. A male may fall on stairs of a hotel.Logical formLearned from3 sentences. Persons may sleep on stairs.Logical formLearned from3 sentences.