Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Problem:The UEFA Champions League is a football competition between the best club teams in Europe .
Solution:
The UEFA Champions League ( abbreviated as UCL ) is an annual club football competition organised by the Union of European Football Associations ( UEFA ) and contested by top-division European clubs , deciding the best team in Europe .