Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
Solution: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
Reason: The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".

Now, solve this instance: Within the band and as a solo singer , she has over forty Top 50 hits and has sold over 140 million albums .
Student:
Collectively , her work both as a member of Fleetwood Mac and as a solo artist has produced over forty top 50 hits and sold over 140 million records , making her one of the best-selling music acts of all time with Fleetwood Mac .