Complex sentence: As of November 15th, 2007, the Standing Rock Sioux tribe has officially disapproved of the use of the Sioux logo, if their support cannot be approved by 2010, then the Fighting Sioux name and mascot will be retired.
Split into simpler sentences: As of November of 2007, the Standing Rock Sioux tribe has officially disapproved of the use of the Sioux logo. If their support cannot be approved by 2010, the Fighting Sioux name and logo will be retired.