def METHOD_NAME(pairs):
    """
    This returns _one_ concordant winner.
    It could be that there are multiple concordant winners, but in our case
    since we are interested in a ranking, we have to choose one at random.
    """
    losers = np.unique(pairs[:, 1]).astype(int)
    winners = np.unique(pairs[:, 0]).astype(int)
    for w in winners:
        if w not in losers:
            return w