Stairs may lead_up to an apartment.Logical formLearned from9 sentences. Stairs can be enclosed.Logical formLearned from9 sentences. A person may love stairs.Logical formLearned from9 sentences. A person may look_up stairs.Logical formLearned from9 sentences. Edges may pertain-to stairs.Logical formLearned from9 sentences. A person may stumble_down stairs.Logical formLearned from9 sentences. Stairs can be cold.Logical formLearned from9 sentences. Structural failure of stairs may take place.Logical formLearned from9 sentences. A part may pertain-to stairs.Logical formLearned from9 sentences. Stairs may pertain-to a place.Logical formLearned from9 sentences. A handrail may pertain-to stairs.Logical formLearned from9 sentences. A stair can be golden.Logical formLearned from9 sentences. A bottom may pertain-to (basement stairs).Logical formLearned from9 sentences. Stairs may pertain-to a porch.Logical formLearned from9 sentences. An edge may pertain-to a stair.Logical formLearned from9 sentences.