Persons may ascend a flight of stairs.Logical formLearned from2 sentences. An area can be behind stairs.Logical formLearned from2 sentences. Stairs can be in a country.Logical formLearned from2 sentences. A banister can be on stairs.Logical formLearned from2 sentences. A first flight may pertain-to stairs.Logical formLearned from2 sentences. Stairs can be stately.Logical formLearned from2 sentences. (Spiral stairs) can be steep.Logical formLearned from2 sentences. A female may lose a nerve on stairs.Logical formLearned from2 sentences. A female may descend a maze of stairs.Logical formLearned from2 sentences. Feet may be pounded on stairs.Logical formLearned from2 sentences. Stairs can be to a stage.Logical formLearned from2 sentences. Stairs can be from a (parking lot).Logical formLearned from2 sentences. A female may climb stairs to a second floor.Logical formLearned from2 sentences. Stairs may lead to a cafeteria.Logical formLearned from2 sentences. Stairs may lead into a basement.Logical formLearned from2 sentences.