A person may come_up a flight of stairs.Logical formLearned from2 sentences. A (stone stair) may lead_up to a world.Logical formLearned from2 sentences. Stairs can be stylish.Logical formLearned from2 sentences. A destination may have stairs.Logical formLearned from2 sentences. Offices can be under stairs.Logical formLearned from2 sentences. A chairlift can be for stairs.Logical formLearned from2 sentences. Stairs may be improved for tourists.Logical formLearned from2 sentences. A tunnel may lead to some stairs to a tunnel.Logical formLearned from2 sentences. Some stairs can be to a tunnel.Logical formLearned from2 sentences. A speaker may use stairs.Logical formLearned from2 sentences. A stair can be articulated.Logical formLearned from2 sentences. A cut may pertain-to stairs.Logical formLearned from2 sentences. (Wood stairs) can be indoor.Logical formLearned from2 sentences. A wayfarer may trudge_up some flights of stairs.Logical formLearned from2 sentences. Stairs can be in buildings.Logical formLearned from2 sentences.