A person may trip_up stairs.Logical formLearned from10 sentences. Stairs may be repaired.Logical formLearned from10 sentences. A female may go_down stairs.Logical formLearned from10 sentences. A person may walk_down a flight of stairs.Logical formLearned from10 sentences. A person may look at stairs.Logical formLearned from10 sentences. Stairs can be to yard.Logical formLearned from10 sentences. A stair can be secret.Logical formLearned from10 sentences. A male may take to stairs.Logical formLearned from10 sentences. A female may stand at a bottom of stairs.Logical formLearned from10 sentences. An underside may pertain-to stairs.Logical formLearned from10 sentences. A stream of visitors may mount stairs to an office.Logical formLearned from10 sentences. An assistant may appear at a top of stairs.Logical formLearned from10 sentences. Winding stairs can be narrow.Logical formLearned from10 sentences. A female may rush_up stairs.Logical formLearned from10 sentences. Persons may head_up stairs.Logical formLearned from10 sentences.