The majority of repetitive post-edits are corrections to punctuation (e.g., deletion of a comma) or auxiliary words (e.g., insertion/deletion of prepositions or articles).
we believe that especially in 5 http://www.statmt.org/wmt17/ translation-task.html 6 http://opus.nlpl.eu/EMEA.php 7 Our baseline scores differ from those provided by the task organisers because of differences in truecasing strategies.