Stairs can be at_home.Logical formLearned from2 sentences. A stair can be slippery.Logical formLearned from2 sentences. Women may climb stairs of (apartment blocks).Logical formLearned from2 sentences. Persons may tumble_down stairs.Logical formLearned from2 sentences. Stairs to a basement may be barred by a gate.Logical formLearned from2 sentences. Stairs may pertain-to an a-320.Logical formLearned from2 sentences. A pope may walk_down stairs from a plane.Logical formLearned from2 sentences. Stairs may be blocked by belongings.Logical formLearned from2 sentences. A fire may break_out in stairs to a club.Logical formLearned from2 sentences. Stairs can be to a club.Logical formLearned from2 sentences. Stairs may call for help.Logical formLearned from2 sentences. A diplomat may run_down some flights of stairs.Logical formLearned from2 sentences. (Marble stairs) can be built.Logical formLearned from2 sentences. A bottom may pertain-to (fire escape stairs).Logical formLearned from2 sentences. A bottom of (fire escape stairs) may be barred by an (iron door).Logical formLearned from2 sentences.