Wikipedia Results

Wikipedia clearly shows that Camilla is the current princess.

Google’s Results

Google nails the results perfectly!

Powerset’s results

Powerset doesn’t even show Camilla’s name in their results

As you can see both search engines eventually come up with the same result all though Powerset doesn’t seem to get it right away. Powerset is supposed to have a bit of smarts under the hood, not just searching through a “word bag” and spewing out unintelligible results. In the end Google still comes out the winner in my book. If you would like to give this process a shot your self try searching for “Who was the 4th man on the moon?”

Try Powerset yourself.
Powerset Aims 4 Google