class mod_on_quantity_modifier
{
    <: mod_on_superlative;
    <: prep;
    node(PP).top.real = value(~-|prel|adj|adv);
    node(Foot).top.supermod_kind = value(quantity);
    Incise >> PP;
    Foot < PP;
    node(prep).bot.pcas = value(pour);
}