A stair may lead to a tunnel.Logical formLearned from1 sentences. Stairs can be fresh.Logical formLearned from1 sentences. A stair may pertain-to a sort.Logical formLearned from1 sentences. A door can be at a head of (cellar stairs).Logical formLearned from1 sentences. A female may cross a hall to stairs.Logical formLearned from1 sentences. A female may reach a head of stairs.Logical formLearned from1 sentences. Stairs may be used as an entrance.Logical formLearned from1 sentences. A young man may ascend stairs.Logical formLearned from1 sentences. Some flight of stairs may be ascended.Logical formLearned from1 sentences. Others may appear at a head of stairs.Logical formLearned from1 sentences. Boys may run_up stairs some steps.Logical formLearned from1 sentences. A female may appear at a head of stairs.Logical formLearned from1 sentences. An opening can be at a head of stairs.Logical formLearned from1 sentences. A female may fling_open a door to stairs.Logical formLearned from1 sentences. The ground may pertain-to stairs.Logical formLearned from1 sentences.