Some stairs can be in a house.Logical formLearned from2 sentences. Stairs can be ugly.Logical formLearned from2 sentences. A (newel post) can be at a foot of stairs.Logical formLearned from2 sentences. Stairs can be to a cellar.Logical formLearned from2 sentences. Stairs may face a door.Logical formLearned from2 sentences. A (stair tower) can be enclosed.Logical formLearned from2 sentences. A stair may be built.Logical formLearned from2 sentences. A female may step_off a stair.Logical formLearned from2 sentences. A hole can be under stairs.Logical formLearned from2 sentences. Stairs can be with a person.Logical formLearned from2 sentences. A person may worry about stairs.Logical formLearned from2 sentences. A male may go_up stairs with a person.Logical formLearned from2 sentences. A level may pertain-to a stair.Logical formLearned from2 sentences. Other persons may use stairs.Logical formLearned from2 sentences. Stairs can be endless.Logical formLearned from2 sentences.