def makesslabel(lexe):
    """Serialize all of a strong lexical expression's supersenses in a string for the full lextag"""
    ss1, ss2 = lexe["ss"], lexe["ss2"]
    if ss1 is None:
        return None
    assert ss1
    if ss2 is not None and ss2 != ss1:
        assert ss2
        return ss1 + "|" + ss2
    return ss1