1. Department of Computer Science, University of Haifa, Israel. shuly@cs.haifa.ac.il
2. Department of Computer Science, University of Haifa, Israel. safa.shehadi@gmail.com
3. Department of Computer Science, University of Haifa, Israel. yuli.zeira@gmail.com
4. Department of Language Science and Technology, Universität des Saarlandes, Germany. s9doosme@stud.uni-saarland.de
5. School of Public Health, University of Haifa, Israel. yuval@stat.haifa.ac.il