Stair may run a sport.Logical formLearned from2 sentences. A female may sit on stairs of a home.Logical formLearned from2 sentences. Stairs may be moved.Logical formLearned from2 sentences. An ankle may fall_down some stairs.Logical formLearned from2 sentences. Positions can be on stairs.Logical formLearned from2 sentences. Stairs may pertain-to a (school building).Logical formLearned from2 sentences. Stairs may pertain-to a (subway station).Logical formLearned from2 sentences. A policeman may fall_down a set of stairs.Logical formLearned from2 sentences. Water may reach to a top of stairs.Logical formLearned from2 sentences. A US-president may go_down stairs of an (one airplane).Logical formLearned from2 sentences. Stairs may pertain-to an (one airplane).Logical formLearned from2 sentences. A male may lie-flat on stairs.Logical formLearned from2 sentences. A male may edge_down stairs.Logical formLearned from2 sentences. A brother may stand a couple of stairs.Logical formLearned from2 sentences. Stairs can be behind a male.Logical formLearned from2 sentences.