Ключевые слова: bad, block, business, choice, client, comment, concept, consumer, customer, dislike, dissatisfaction, dissatisfied, emoticon, emotion, evaluation, experience, expression, feedback, feeling, give, hand, low, marketing, negative, one, online, opinion, person, poor, product, quality, ranking, rate, rating, reputation, result, review, sad, satisfaction, score, service, sign, star, survey, symbol, unhappy, unsatisfied, user, vote, wood,