This zip file contains the dataset used in the article:

Burçin Buket Oğul and Gonenc Ercan. Sentiment Classification On Turkish Hotel Reviews. In Proceedings of the 24. IEEE Sinyal İşleme ve İletişim Uygulamaları Kurultayı (SIU 2016), Zonguldak, Mayıs 2016. 

The zip file is password protected. The password should be requested by email from gonenc[at]cs.hacettepe.edu.tr