Simplify the following text for a Grade 13 native English-speaking person.
Original: The CIBF was founded by the General Egyptian Book Organisation , a government publishers and retailers group , in 1969 to coincide with celebrations of the 1000th anniversary of the founding of the city of Cairo .
Simplified: The CIBF was started by the General Egyptian Book Organisation , a government publishers and retailers group , in 1969 as part of the celebrations of the 1000th anniversary of the start of the city of Cairo .