Simplify the following text for a Grade 10 native English-speaking person.
Original: After a dispute between FOTA and the FIA in the first half of 2009 , a new Concorde Agreement was signed by Mosley and all of the teams except BMW Sauber , which had announced its intention of withdrawing from the sport at the end of the season shortly beforehand .
Simplified: After a dispute between FOTA and the FIA in the first half of 2009 , a new Concorde Agreement was signed by Mosley and all of the teams except BMW Sauber .