How may Africans?

We were meandering across the plains of metre high grass, when John noted that, should the Kenyan government ever decide to abandon the Reserve for these wonderful animals, that contract for harvesting the entire area would be a “nice one” indeed. Those that are into the harvesting caper (Alison take note) would appreciate the idea.
Then, we came across another van with a flat tyre where Athens had already pulled up to help. So of course, Our guide William did too, and my question is:
How many Africans does it take to change a tyre?

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