Stairs can be at an end of a passage.Logical formLearned from1 sentences. Stairs can be in a block.Logical formLearned from1 sentences. A wreckage may pertain-to stairs.Logical formLearned from1 sentences. Stairs may strike an electric light.Logical formLearned from1 sentences. (Cellar stairs) may collapse.Logical formLearned from1 sentences. A step may pertain-to (cellar stairs).Logical formLearned from1 sentences. Stairs may lead to a story.Logical formLearned from1 sentences. A person may break a neck on stairs.Logical formLearned from1 sentences. Stairs may lead to a story.Logical formLearned from1 sentences. A male may run_up stairs with an intention of attacking a male.Logical formLearned from1 sentences. A male may knock_down a person stairs.Logical formLearned from1 sentences. A male may mount stairs some steps.Logical formLearned from1 sentences. A telephone can be on a landing of stairs.Logical formLearned from1 sentences. A male may rush_down stairs to a resort.Logical formLearned from1 sentences. A male may glide toward stairs.Logical formLearned from1 sentences.