Narrow stairs can be to a street.Logical formLearned from2 sentences. Footsteps may ring on stairs.Logical formLearned from2 sentences. Father may tramp_up stairs.Logical formLearned from2 sentences. Stairs may lead_up to a ballroom.Logical formLearned from2 sentences. Stairs can be broken.Logical formLearned from2 sentences. A male may go to a head of stairs.Logical formLearned from2 sentences. Feet may clatter on stairs.Logical formLearned from2 sentences. Stairs can be on a west side.Logical formLearned from2 sentences. Difficulty may use stairs.Logical formLearned from2 sentences. A female may cover stairs with wool.Logical formLearned from2 sentences. Stairs can be in buildings.Logical formLearned from2 sentences. Stairs may be ascended on knees.Logical formLearned from2 sentences. Stairs may be brought.Logical formLearned from2 sentences. A hand may point_up a flight of stairs.Logical formLearned from2 sentences. A stair can be narrow.Logical formLearned from2 sentences.