Joke of the day: President Jonathan vs Queen Elizabeth

Got this joke from the stable of TEJU BABYFACE SHOW and it goes like this:
G.E. Jonathan met with the Queen of England.
He asked her, "Your
majesty, how do you
run such an efficient
government? Are
there any tips you can
give to me? I want to
help Nigeria" "well, said the Queen, "the most important thing is to surround yourself with intelligent people."
Jonathan frowned, and then asked, "But how do i know the people around me are really intelligent?" The Queen took a sip of her tea.
Oh, that's easy; you
just ask them to
answer an intelligent
riddle. The Queen
pushed a button on her intercom. "Please... send David Cameron in here, would you?" David Cameron walked into the room and said, "Yes , your majesty?"
The Queen smiled and
said, "Answer me this
please. David, your
mother and father have a child, it is not your brother and it is not your sister. Who is it?" without pausing for a minute David Cameron answered, "that would be me." Yes, very good, "said the Queen.
Jonathan went back
home to ask N. Sambo, answer this for me, your mother and your father have a child, its not your brother and its not your sister, who is
it?" "I'm not sure" said
Sambo. "Let me get
back to you on that one, but none could give him an answer. Finally, one day, he ran into Dora Akunyili. Sambo asked, "Dora, can you answer this for me? Your mother and father have a child and its not your
brother or sister, who is it?" Dora answered
sharply, "That's easy,
its me! Sambo smiled,
and said "thanks!" Then he went back to speak with Jonathan. Sir, "I did some research and I have the answer to that riddle", It's Dora
Akunyili! Jonathan got
up angrily, frowning he said to Sambo. No
wonder Nigeria isn't
moving forward, I don't have intelligent people around me. "You Dummy!" The answer is David Cameron!!!!