def get_sharp_relation(follows, instance_one, instance_two):
    """
    Returns true if sharp relations holds

    Parameters
    -------------
    follows
        Follows relations
    instance_one
        Instance one
    instance_two
        Instance two

    Returns
    -------------
    bool
        Boolean (sharp relation holds?)
    """
    if instance_one in follows:
        if instance_two in follows:
            if not instance_two in follows[instance_one
                ] and not instance_one in follows[instance_two]:
                return True
    if not instance_one in follows and not instance_two in follows:
        return True
    if instance_one in follows:
        if instance_two in follows[instance_one]:
            return False
    if instance_two in follows:
        if instance_one in follows[instance_two]:
            return False
