Steps can be on stairs.Logical formLearned from15 sentences. A footstep can be on stairs.Logical formLearned from15 sentences. Stairs can be dark.Logical formLearned from15 sentences. A person may walk stairs.Logical formLearned from15 sentences. Roof may offer views (spiral stairs).Logical formLearned from15 sentences. A male may creep_up stairs.Logical formLearned from15 sentences. A male may go_down stairs.Logical formLearned from15 sentences. A female may appear at a top of stairs.Logical formLearned from15 sentences. A stair can be curved.Logical formLearned from15 sentences. Stairs may pertain-to a temple.Logical formLearned from15 sentences. Stairs may except a subterrane.Logical formLearned from15 sentences. Stairs may lead to a basement.Logical formLearned from15 sentences. A person may hate stairs.Logical formLearned from15 sentences. Click can be on stairs.Logical formLearned from15 sentences. Persons may reach a top of stairs.Logical formLearned from15 sentences.