We annotated the product review data on word-level.
If you are interested in this dataset, please contact me.
As attribution, please cite this paper:
Wiltrud Kessler and Hinrich Schütze (2012)
Classification of Inconsistent Sentiment Words Using Syntactic Constructions.
In Proceedings of the 24th International Conference on Computational Linguistics (COLING 2012),
Mumbai, India, 10.-14. December 2012. pages 569-578.