The Ratio related ability to merge or split into Equal parts of black holes according to Quantum FFF Theory.
The equal Herbig Haro ratio seems to be important tot form HH systems even as the origin of Cygnus A dual Hotspot black holes.
Markarian 231 is postulated to be the intermediate stage to produce extra HH systems for more complexity. to form triple and dual radio galaxies (see below)
The result of Markarian BH splitting seems to be found in Triple - Double Radio Galaxies.