
function res = project_n(model, sentence_nr, lang) 

    if nargin<3
        lang = 'est';
    end


    if (strcmp(lang, 'est'))
        sentence_vector = model.vectors_est(:, sentence_nr);
        f_x = model.f_est;
    else
        sentence_vector = model.vectors_eng(:, sentence_nr);
        f_x = model.f_eng;
    end

    
    res = f_x' * sentence_vector;
    

end
