Stairs may rise to first floor.Logical formLearned from2 sentences. Stairs may lead to a (ground floor).Logical formLearned from2 sentences. Persons may pause on stairs.Logical formLearned from2 sentences. Narrow stairs can be dark.Logical formLearned from2 sentences. Stairs may pertain-to a lighthouse.Logical formLearned from2 sentences. A staircase can be with a surface of stairs.Logical formLearned from2 sentences. A female may stamp_up stairs.Logical formLearned from2 sentences. Stairs can be to the south.Logical formLearned from2 sentences. Stairs can be bare.Logical formLearned from2 sentences. A female may look_down stairs.Logical formLearned from2 sentences. A (cubby hole) can be under stairs.Logical formLearned from2 sentences. A man can be at a bottom of stairs.Logical formLearned from2 sentences. A male may call_up stairs.Logical formLearned from2 sentences. A male may lie at a foot of stairs.Logical formLearned from2 sentences. An one may use stairs.Logical formLearned from2 sentences.