dc.contributor.author |
Ivanov V. |
|
dc.contributor.author |
Tutubalina E. |
|
dc.contributor.author |
Mingazov N. |
|
dc.contributor.author |
Alimova I. |
|
dc.date.accessioned |
2018-09-18T20:48:56Z |
|
dc.date.available |
2018-09-18T20:48:56Z |
|
dc.date.issued |
2015 |
|
dc.identifier.issn |
2221-7932 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/142443 |
|
dc.description.abstract |
This paper describes a method for solving aspect-based sentiment analysis tasks in restaurant and car reviews subject domains. These tasks were articulated in the Sentiment Evaluation for Russian (SentiRuEval-2015) initiative. During the SentiRuEval-2015 we focused on three subtasks: extracting explicit aspect terms from user reviews (tasks A), aspect-based sentiment classification (task C) as well as automatic categorization of aspects (task D). In aspect-based sentiment classification (tasks C and D) we propose two supervised methods based on a Maximum Entropy model and Support Vector Machines (SVM), respectively, that use a set of term frequency features in a context of the aspect term and lexicon-based features. We achieved 40% of macro-averaged F-measure for cars and 40,05% for reviews about restaurants in task C. We achieved 65.2% of macro-averaged F-measure for cars and 86.5% for reviews about restaurants in task D. This method ranked first among 4 teams in both subject domains. The SVM classifier is based on unigram features and pointwise mutual information to calculate category-specific score and associate each aspect with a proper category in a subject domain. Extracting Aspects, Sentiment and Categories of Aspects in User Reviews In task A we carefully evaluated performance of a method based on syntactic and statistical features incorporated in a Conditional Random Fields model. Unfortunately, the method did not show any significant improvement over a baseline. However, its results are also presented in the paper. |
|
dc.relation.ispartofseries |
Komp'juternaja Lingvistika i Intellektual'nye Tehnologii |
|
dc.subject |
Aspect categories |
|
dc.subject |
Aspect extraction |
|
dc.subject |
Aspect-based sentiment analysis |
|
dc.subject |
Sentirueval |
|
dc.subject |
User reviews |
|
dc.title |
Extracting aspects, sentiment and categories of aspects in user reviews about restaurants and cars |
|
dc.type |
Conference Paper |
|
dc.relation.ispartofseries-issue |
14 |
|
dc.relation.ispartofseries-volume |
2 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
22 |
|
dc.source.id |
SCOPUS22217932-2015-2-14-SID84952793306 |
|