A person may climb narrow stairs.Logical formLearned from4 sentences. A tree may lug_up stairs to a place.Logical formLearned from4 sentences. Stairs can be in a photo.Logical formLearned from4 sentences. A killer can be on stairs of offices.Logical formLearned from4 sentences. A female can be on a flight of stairs.Logical formLearned from4 sentences. Stairs may pertain-to offices.Logical formLearned from4 sentences. Stairs can be restless.Logical formLearned from4 sentences. A kid may get stairs.Logical formLearned from4 sentences. A female may head stairs.Logical formLearned from4 sentences. A president may slip on stairs.Logical formLearned from4 sentences. A female may go stairs.Logical formLearned from4 sentences. A female may die after fall_downing stairs.Logical formLearned from4 sentences. A person may descend a flight of stairs.Logical formLearned from4 sentences. Hearts may coil_up stairs.Logical formLearned from4 sentences. Stairs may lead to a yard.Logical formLearned from4 sentences.