Optimal encoding! - Information Theory constrains article omission in newspaper headlines Robin Lemke author Eva Horch author Ingo Reich author 2017-04 text Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics: Volume 2, Short Papers Mirella Lapata editor Phil Blunsom editor Alexander Koller editor Association for Computational Linguistics Valencia, Spain conference publication lemke-etal-2017-optimal https://aclanthology.org/E17-2021/ 2017-04 131 135