Abstract: With the emerging of various online video platforms like Youtube, Youku and LeTV, online TV series' reviews become more and more important both for viewers and producers. Customers rely heavily on these reviews before selecting TV series, while producers use them to improve the quality. As a result, automatically classifying reviews according to different requirements evolves as a popular research topic and is essential in our daily life. In this paper, we focused on reviews of hot TV series in China and successfully trained generic classifiers based on eight predefined categories. The experimental results showed promising performance and effectiveness of its generalization to different TV series.

Introduction: With Web 2.0's development, more and more commercial websites, such as Amazon, Youtube and Youku, encourage users to post product reviews on their platforms BIBREF0 , BIBREF1 . These reviews are helpful for both readers and product manufacturers. For example, for TV or movie producers, online reviews indicates the aspects that viewers like and/or dislike. This information facilitates producers' production process. When producing future films TV series, they can tailer their shows to better accommodate consumers' tastes. For manufacturers, reviews may reveal customers' preference and feedback on product functions, which help manufacturers to improve their products in future development. On the other hand, consumers can evaluate the quality of product or TV series based on online reviews, which help them make final decisions of whether to buy or watch it. However, there are thousands of reviews emerging every day. Given the limited time and attention consumers have, it is impossible for them to allocate equal amount of attention to all the reviews. Moreover, some readers may be only interested in certain aspects of a product or TV series. It's been a waste of time to look at other irrelevant ones. As a result, automatic classification of reviews is essential for the review platforms to provide a better perception of the review contents to the users. Most of the existing review studies focus on product reviews in English. While in this paper, we focus on reviews of hot Chinese movies or TV series, which owns some unique characteristics. First, Table TABREF1 shows Chinese movies' development BIBREF2 in recent years. The growth of box office and viewers is dramatically high in these years, which provides substantial reviewer basis for the movie/TV series review data. Moreover, the State Administration of Radio Film and Television also announced that the size of the movie market in China is at the 2nd place right after the North America market. In BIBREF2 , it also has been predicted that the movie market in China may eventually become the largest movie market in the world within the next 5-10 years. Therefore, it is of great interest to researchers, practitioners and investors to understand the movie market in China. Besides flourishing of movie/TV series, there are differences of aspect focuses between product and TV series reviews. When a reviewer writes a movie/TV series review, he or she not only care about the TV elements like actor/actress, visual effect, dialogues and music, but also related teams consisted of director, screenwriter, producer, etc. However, with product reviews, few reviewers care about the corresponding backstage teams. What they do care and will comment about are only product related issues like drawbacks of the product functions, or which aspect of the merchandise they like or dislike. Moreover, most of recent researchers' work has been focused on English texts due to its simpler grammatical structure and less vocabulary, as compared with Chinese. Therefore, Chinese movie reviews not only provide more content based information, but also raise more technical challenges. With bloom of Chinese movies, automatic classification of Chinese movie reviews is really essential and meaningful. In this paper, we proposed several strategies to make our classifiers generalizable to agnostic TV series. First, TV series roles' and actors/actresses' names are substituted by generic tags like role_i and player_j, where i and j defines their importance in this movie. On top of such kind of words, feature tokens are further manipulated by feature selection techniques like DRC or INLINEFORM0 , in order to make it more generic. We also experimented with different feature sizes with multiple classifiers in order to alleviate overfitting with high dimension features. The remainder of this paper is organized as follows. Section 2 describes some related work. Section 3 states our problem and details our proposed procedure of approaching the problem. In Section 4, experimental results are provided and discussed. Finally, the conclusions are presented in Section 5.

Question: How long is the dataset?
Answer: Answer with content missing: (Table 2) Dataset contains 19062 reviews from 3 tv series.