class verb_mod_extraction 
{
    %% extractions by adjunctions for non verb argument
    - shallow_auxiliary;
    Root = S2;
    Foot = S;
    node(S2).cat = value(S);
    node(S).top.extraction = value(adjx|estceaux);
    node(S).top.xarg.case = value(-);
    S2 >> XGroup;
    XGroup < S;
    node(S).top.mode = value(~imperative|participle|gerundive);
%%    desc.extraction = value(rel|wh);
    desc.extraction = node(S2).top.extraction;
    %% Agreement between S2.top and S2.bot on all features
    node(S2).bot = node(S2).top;
    %% Agreement between S and S2 on almost all features
    node(S2).bot.gender = node(S).top.gender;
    node(S2).bot.number = node(S).top.number;
    node(S2).bot.person = node(S).top.person;
    node(S2).bot.mode = node(S).top.mode;
    node(S2).bot.tense = node(S).top.tense;
    node(S2).bot.neg = node(S).top.neg;
    node(S2).bot.wh = node(S).top.wh;
    node(S2).bot.sat = node(S).top.sat;
    node(S2).bot.inv = node(S).top.inv;
}