Assessing Crowdsourcing Quality through Objective Tasks Ahmet Aker author Mahmoud El-Haj author M-Dyaa Albakour author Udo Kruschwitz author 2012-05 text Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC’12) Nicoletta Calzolari editor Khalid Choukri editor Thierry Declerck editor Mehmet Uğur Doğan editor Bente Maegaard editor Joseph Mariani editor Asuncion Moreno editor Jan Odijk editor Stelios Piperidis editor European Language Resources Association (ELRA) Istanbul, Turkey conference publication aker-etal-2012-assessing https://aclanthology.org/L12-1330/ 2012-05 1456 1461