* Proceedings of the 3rd Workshop on Natural Language Processing
Techniques for Educational Applications, pages 30 to 39, Osaka, Japan,
December 12 2016 * 10 pages. Appears in the Proceedings of The 3rd Workshop on Natural
Language Processing Techniques for Educational Applications (NLPTEA 2016) Access Paper or Ask Questions
* Language Resources and Evaluation, Aug 2012 * It contains 31 pages, 6 figures, and 10 tables. It has been submitted
to Language Resource and Evaluation Journal Access Paper or Ask Questions