Stairs may pertain-to a language.Logical formLearned from2 sentences. Stair may undergo an assessment.Logical formLearned from2 sentences. Escalators can be with stairs.Logical formLearned from2 sentences. Signs may encourage (stair use).Logical formLearned from2 sentences. Stairs can be careful.Logical formLearned from2 sentences. A person may climb flights of stairs.Logical formLearned from2 sentences. A (rub chain) may sprawl_up a flight of stairs.Logical formLearned from2 sentences. An (escape route) can be without stairs.Logical formLearned from2 sentences. A part may pertain-to a stair.Logical formLearned from2 sentences. Stairs may lead to a site.Logical formLearned from2 sentences. Stairs may be demolished.Logical formLearned from2 sentences. Some urns may stand at a top of a set of stairs.Logical formLearned from2 sentences. A park may include stairs.Logical formLearned from2 sentences. A (stair step) may be seen in profiles of some areas.Logical formLearned from2 sentences. Sequences can be constituted-of-or-filled-with stairs.Logical formLearned from2 sentences.