He also has three other children from previous relationships , whose existence was only publicly revealed during the 2008 mayoral election .
He also has three other children from previous relationships , whose existence was only publicly revealed during the -LRB- -LRB- London mayoral election , 2008 .
He also has three other children from previous relationships , whose existence was only publicly revealed during the -LRB- -LRB- London mayoral election , 2008 .
Simplify this paragraph: He also has three other children from previous relationships , whose existence was only publicly revealed during the 2008 mayoral election . Output: