Sentence:  Making nuc up top gives them some heat advantage PLUS allows you to run the unit as a two <WSD>queener</WSD> for a while and upon pulling the double screen or dividing board at start of of aimed for flow the UPPER queen usually ends up being the only queen in time (mark her a different color so you can see as this is being done for educational reasons). 
Meaning of the word marked with <WSD> tags:  A beehive having the specified number of queens.