Stairs can be to a kitchen.Logical formLearned from3 sentences. A person may see a person on stairs.Logical formLearned from3 sentences. A stair may lead to heaven.Logical formLearned from3 sentences. Stairs may pick_up articles of clothing.Logical formLearned from3 sentences. Persons may hear a male on stairs.Logical formLearned from3 sentences. A person may examine stairs.Logical formLearned from3 sentences. A person may fall_down a set of stairs.Logical formLearned from3 sentences. Persons may find stairs.Logical formLearned from3 sentences. Stairs can be at an end.Logical formLearned from3 sentences. A person may go stairs some times.Logical formLearned from3 sentences. Stairs can be in a room.Logical formLearned from3 sentences. Stairs can be challenging.Logical formLearned from3 sentences. A female may head to stairs.Logical formLearned from3 sentences. A male may move to stairs.Logical formLearned from3 sentences. A person may exercise by climbing stairs.Logical formLearned from3 sentences.