Simplify the following text for a Grade 7 native English-speaking person.
Original: After Sanger 's departure , Nupedia increasingly became an afterthought to Wikipedia ; of the Nupedia articles that completed the review process , only two did so after 2001 .
Simplified: When Wikipedia took over , the articles from Nupedia were moved there , and those were the first articles of Wikipedia . Nupedia is a test site that was made before Wikipedia .