A (stair opening) may interrupt a connection.Logical formLearned from2 sentences. (Stair openings) may play a role.Logical formLearned from2 sentences. A landing can be at a bottom of a stair.Logical formLearned from2 sentences. A stair may terminate at a top.Logical formLearned from2 sentences. A stair may include a landing.Logical formLearned from2 sentences. Stairs can be in dwellings.Logical formLearned from2 sentences. A configuration may pertain-to stairs.Logical formLearned from2 sentences. Stairs can be significant.Logical formLearned from2 sentences. (Stair openings) can be in floors.Logical formLearned from2 sentences. A framing of (stair openings) may have an effect.Logical formLearned from2 sentences. Stairs may ascend.Logical formLearned from2 sentences. An office can be at a top of stairs.Logical formLearned from2 sentences. Stairs can be reconstructed.Logical formLearned from2 sentences. Some sets can be constituted-of-or-filled-with (metal stairs).Logical formLearned from2 sentences. A male may ascend stairs.Logical formLearned from2 sentences.