spec.addFilter(getPunctuationFilter(examples));
spec.addFilter(getSpecialWordsFilter(examples));
spec.addFilter(getSpellingFilter(examples));
spec.addFilter(getEmoticonsFilter(examples));
spec.addFilter(getBagOfWordsFilter(examples));
if (this.getParticipantFeatureCount() > 0) {
spec.addFilter(getParticipantsFilter(examples));
} else {
spec.addFilter(getRemoveParticipantFilter(examples));