def mean_labels(input_dict):
    """
    Function to calculate the macro-F1 score from labels

    Args:
        input_dict (dict): classification report dictionary

    Returns:
        (float): macro-F1 score
    """
    sum_f1 = (float(input_dict["3"]["f1-score"]) +
              float(input_dict["4"]["f1-score"]) +
              float(input_dict["5"]["f1-score"]))
    return sum_f1 / 3