Complex sentence: After its fourth week this figure had risen to 15 million, and by 11 April, the film had surpassed the viewing audience of "La Grande Vadrouille", having being watched by more than 17.4 million people.
Split into simpler sentences: After its fourth week on release, this figure had risen to 15 million viewers. On 11 April, the film surpassed the viewing audience of "La Grande Vadrouille", having being watched by more than 17.4 million people.