Original sentence: However a number of challenges may face their attempt, such as the fact that the number of participating entries has more than doubled since the last time an orchestra was seen on the Eurovision stage, with more than 40 entries now competing every year
Edited sentence: Some challenges may face their attempt, such as the fact that the number of participating entries has increased from 25 to around 40 since the last time an orchestra was seen on the Eurovision stage, with more than 40 entries now competing every year