class verb_extraction_topic_passive
{
    %% we may have topicalization with passive voice
    %% example: à Paul sera offert un livre d'image.
    %% topicalization is not allowed on the agent (arg0)
    <: verb_extraction_topic;
    desc.ht.diathesis = value(passive);
    $arg0.extracted = value(-);
    $arg1.extracted = value(-);
    XGroup = arg2::TopicComp;
    %% it does not seem possible to topicalize on an adjective in passive voice
    %% * stupide est trouvé ce discours !
    $arg2.kind = value(~acomp);
}