class verb_agreement_ancestor
{
    + vagreement_ancestor;
    node(Ancestor).bot.number = node(V).top.number;
    node(Ancestor).bot.gender = node(V).top.gender;
    node(Ancestor).bot.tense = node(V).top.tense;
    node(Ancestor).bot.mode = node(V).top.mode;
    node(Ancestor).bot.person = node(V).top.person;
    node(Ancestor).bot.quant = node(V).top.quant;
%%    father(V).bot.diathesis = node(V).top.diathesis;
    Ancestor >>+ V;
}