Simplify the following text for a Grade 15 native English-speaking person.
Original: This includes 73,645 regular Britannica articles , with the remainder drawn from the Britannica Student EncyclopÃ dia , the Britannica Elementary EncyclopÃ dia and the Britannica Book of the Year ( 1993 â `` 2004 ) , plus a few `` classic '' articles from early editions of the encyclopedia .
Simplified: It includes 73,645 Britannica articles , with the other articles from the Britannica Student EncyclopÃ dia , the Britannica Elementary EncyclopÃ dia and the Britannica Book of the Years ( 1993 â `` 2004 ) , plus a few old articles from old editions of the encyclopedia .