Police may approach on stairs.Logical formLearned from2 sentences. A top may pertain-to narrow stairs.Logical formLearned from2 sentences. Police may cordon_off stairs with (orange police tape).Logical formLearned from2 sentences. Police may cordon_off stairs.Logical formLearned from2 sentences. Stairs can be with some suspects.Logical formLearned from2 sentences. Stairs can be in a stairway.Logical formLearned from2 sentences. Stairs may be covered with blood.Logical formLearned from2 sentences. Visitors may see stairs.Logical formLearned from2 sentences. Some persons may stand on stairs.Logical formLearned from2 sentences. Some flights of stairs may cram full of (computer workstations).Logical formLearned from2 sentences. Stairs may lean on a cane.Logical formLearned from2 sentences. A person may be amazed by moving stairs.Logical formLearned from2 sentences. A hospital may have (emergency stairs).Logical formLearned from2 sentences. Stairs may pertain-to a cathedral.Logical formLearned from2 sentences. Stairs may hit a pitch.Logical formLearned from2 sentences.