def is_copula_relation(token1, token2):
    """Return True if `token1` is a copula dependent of `token2`.

    We don't want to capture cases where `token2` is an adjective, because
    we capture those in `is_predicated_adjective_relation()`.

    """
    return (
        (token1.deprel == "cop")
        and (token2.upos != "ADJ")
        and (token1.head == token2.id)
    )