A male may point_up stairs.Logical formLearned from3 sentences. Stairs can be in condition.Logical formLearned from3 sentences. A male may handle stairs.Logical formLearned from3 sentences. Stairs may rise.Logical formLearned from3 sentences. A creature may tumble_down stairs.Logical formLearned from3 sentences. Some stairs can be on a front porch.Logical formLearned from3 sentences. Stairs can be (deal exercise machine).Logical formLearned from3 sentences. A tower may have stairs.Logical formLearned from3 sentences. A person may use stairs a lot.Logical formLearned from3 sentences. A stair may climb.Logical formLearned from3 sentences. A person may climb_up some flights of stairs.Logical formLearned from3 sentences. A middle may pertain-to a stair.Logical formLearned from3 sentences. Persons may push_down a body stairs.Logical formLearned from3 sentences. Stairs can be a problem.Logical formLearned from3 sentences. A hall can be at a top of stairs.Logical formLearned from3 sentences.