I know that we can only create small amounts of antimatter. But, suppose that we could create lots and lots of antimatter and we kept sending it into space to some empty place far away from our solar system. We keep sending antimatter to the same spot until the mass is enough for it to collapse into a blackhole. So now we have an antimatter blackhole. What would happen if this antimatter blackhole merged with a regular blackhole? Would they just merge or would they annihilate each other?