Title	Developing and Pre-Processing a Dataset using a Rhetorical Relation to Build a Question-Answering System based on an Unsupervised Learning Approach
Author	Ashit Kumar Dutta, Abdul Rahaman Wahab sait, Ismail Mohamed Keshta, and Abheer Elhalles
Citation	Vol. 21  No. 11  pp. 199-206
Keywords	Arabic dataset, rhetorical relation, discourse relation, rhetorical structure theory, Question-Answering system, natural language processing.

Title	Analyzing Tweets for Better Decision-Making using Machine Learning
Author	Hazzaa N. Alshareef and Imran Usman
Citation	Vol. 21  No. 10  pp. 119-124
Keywords	Arabic Tweets, Na?ve Bayes Classifier. Sentiment Analysis

Title	Growing Hadiths Ontology
Author	Salah Alamri
Citation	Vol. 21  No. 9  pp. 317-322
Keywords	Ontology, Hadiths Ontology, Growing Ontology, Ontology Extraction, Arabic Language.

Title	A Survey of Arabic Thematic Sentiment Analysis Based on Topic Modeling
Author	Seham Basabain
Citation	Vol. 21  No. 9  pp. 155-162
Keywords	Sentiment Analysis, Arabic Natural Language Processing, Topic Modeling, LDA, Language modeling