[NTG-context] Double height rows using natural tables?

I have tried various combinations and have so far been unsuccessful in getting a row of double height using natural tables. I am following up and enclosing a minimal example, along with the a previous incarnation using TABLE, which does give me the intended layout. Any suggestions on how to do the same using natural tables would be greatly appreciated. advTHANKSance. -- ----- - Pavneet Arora