Stairs can be tricky.Logical formLearned from6 sentences. Stairs may crumble.Logical formLearned from6 sentences. A winding stair can be narrow.Logical formLearned from6 sentences. A female may opt for stairs.Logical formLearned from6 sentences. A male may pause on stairs.Logical formLearned from6 sentences. A female may march_down stairs.Logical formLearned from6 sentences. A male may climb a set of stairs.Logical formLearned from6 sentences. A male may climb stairs to a bedroom.Logical formLearned from6 sentences. A male may approach stairs.Logical formLearned from6 sentences. (Marble stairs) may lead_up to doric columns.Logical formLearned from6 sentences. An entrance to a building may be set upon a set of (marble stairs).Logical formLearned from6 sentences. Stairs may undergo a rise.Logical formLearned from6 sentences. A female may fly_down stairs.Logical formLearned from6 sentences. A person may stumble_up stairs.Logical formLearned from6 sentences. A party may ascend stairs.Logical formLearned from6 sentences.