Simplify the following text for a Grade 12 native English-speaking person.
Original: Sejima has been appointed Director of the Architecture Sector for the Venice Biennale , for which she will curate the 12th Annual International Architecture Exhibition , to be held in 2010 .
Simplified: Sejima became Director of the Architecture Sector for the Venice Biennale . She organized the 12th Annual International Architecture Exhibition , which was held in 2010 .