Content quality of answers in all six language zones during the early and later period of the ECORN-CF system. Each column represents the mean of all scores for the expert answers from the respective period marked as "early" or "later" and the respective language zone. The squares represent the highest and lowest mean score given to a single answer. The blue columns marked as "all" represent the mean of the scores for all 50 expert answers from all language zones of the early period and for all 58 expert answers from all language zones of the later period, respectively. Dark grey columns represent answers of "good" quality, light grey columns those of "satisfactory" quality. B/NL = Belgium/Netherlands, CZ = Czech Republic, GER = Germany, LIT = Lithuania, ROM = Romania, UK = United Kingdom.