def convert_q1_choice(choice):
    mapping = {
        "1. Explanation A was *much easier* to understand": 1,
        "2. Explanation A was *somewhat easier* to understand": 2,
        "3. Both explanations were *about the same*": 3,
        "4. Explanation B was *somewhat easier* to understand": 4,
        "5. Explanation B was *much easier* to understand": 5,
    }
    return str(mapping.get(choice, -1))