Only one, but they get three tech. reports out of it.
or
Three:
One to write the light bulb removal program,
one to write the light bulb insertion program, and
one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.
or
At the hickory dickory dock.
or
He wanted his soil to be rich!
or
So I went - and I got it.
or