A person may fall_off stairs.Logical formLearned from7 sentences. A last step may pertain-to stairs.Logical formLearned from7 sentences. A female can be stairs.Logical formLearned from7 sentences. A dash can be for stairs.Logical formLearned from7 sentences. A person may climb stairs to a bedroom.Logical formLearned from7 sentences. Someone may come_down stairs.Logical formLearned from7 sentences. A female may walk_up stairs to a room.Logical formLearned from7 sentences. Stairs may continue.Logical formLearned from7 sentences. Stairs can be to a bedroom.Logical formLearned from7 sentences. Stairs may pertain-to an (apartment complex).Logical formLearned from7 sentences. Persons may walk_down some flights of stairs.Logical formLearned from7 sentences. A conqueror may hide at a top of stairs.Logical formLearned from7 sentences. A person may stop at a top of stairs.Logical formLearned from7 sentences. A person may come_down a stair.Logical formLearned from7 sentences. A female may reach a foot of stairs.Logical formLearned from7 sentences.