Corpus for implicit aspect extraction and implicit aspect indicator extraction Webpage: http://www.gelbukh.com/resources/implicit-aspect-extraction-corpus/ This corpus was used for the experiments presented in the paper: Ivan Omar Cruz-Garcia, Alexander Gelbukh, Grigori Sidorov. Implicit Aspect Indicator Extraction for Aspect-based Opinion Mining. 2014, submitted. Any work that uses the dataset should cite the abovementioned paper(s). License: free for non-commercial academic purposes. Any publication that benefited from these data must state the origin of the data and cite the abovementioned paper(s). We will be grateful to you if you let us know of the use of the data and of citing our papers. Any derived work should specify the original source and its authors and contain this license, including the publication references mentioned above. If you modify this corpus, correct errors in it, or add annotation to it, we will be grateful if you send us the new version, to be available from this site. This corpus is based on the Customer Review Datasets (5 products) corpus described in: M. Hu, B. Liu, Mining and summarizing customer reviews, in: Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery & Data Mining, 2004, pp. 168–177; see Bing Liu's Opinion Lexicon page. We used the text of that corpus, removed all original annotations and comments, and manually added annotation of implicit aspects and implicit aspect indicators.