Complex sentence: In 2014 and 2015, on December 19,20 and 21 and the fourth edition of EVC was held on the 17th, 18th and 19th of December, 2016.
Split into simpler sentences: In 2014 and 2015, on December 19,20 and 21. The fourth edition of EVC was held on the 17th, 18th and 19th of December, 2016.