Two. One to assume the ladder and one to change the bulb.
A': None. If the government would just leave it alone, it would screw itself in.
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A car
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Silly, WASPs don't screw in a light bulb, they screw in a hot tub.
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Shamboo!
Frankenstein: Witch can you make me a lemonade?
Witch: Poof you are a lemonade!
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Because an undocumented worker has been living on his head for the past 2 decades!
or