class adv {
    %% Adverbs
%    <: simple_categories;
    <: categories;
    node Adv : [cat: adv, bot: [degree: -]]; Adv=Anchor;
    desc.ht = value([arg1:@emptyarg_fs,arg2:@emptyarg_fs,diathesis: -, imp: -, ctrsubj: -]);
    desc.@extracted0 = value(-);
}