A female may step_down stairs.Logical formLearned from7 sentences. A person may run_down stairs with hailstones.Logical formLearned from7 sentences. A labyrinth can be constituted-of-or-filled-with stairs.Logical formLearned from7 sentences. A person may walk_up stairs to an apartment.Logical formLearned from7 sentences. Persons may mount stairs.Logical formLearned from7 sentences. Stairs may lead to rooms.Logical formLearned from7 sentences. A stair may be mutilated.Logical formLearned from7 sentences. A male may reach a foot of stairs.Logical formLearned from7 sentences. Footsteps may come_up stairs.Logical formLearned from7 sentences. A person may hate stairs.Logical formLearned from7 sentences. A person may climb stairs to an apartment.Logical formLearned from7 sentences. Stairs may pertain-to a US-city.Logical formLearned from7 sentences. Stairs can be hard.Logical formLearned from7 sentences. A deck can be with stairs.Logical formLearned from7 sentences. Stairs may pertain-to a deck.Logical formLearned from7 sentences.