static LanguageDetectionTask dm_languageDetectionTask(S lang1, S lang2) {
  new LanguageDetectionTask task;
  task.lang1 = lang1;
  task.lang2 = lang2;
  task.pos = dm_examplesForLanguageFromCRUD(lang1);
  task.neg = dm_examplesForLanguageFromCRUD(lang2);
  ret task;
}