Other than being quite racist have you ever heard of George Gregan or Will Genia from the Wallabies?
Neither is league,
But Will Genia is a Papua new Guinean from Papua new Guinea.
If the obvious papuan surname wasnt the biggest hint, here is his wiki
https://en.wikipedia.org/wiki/Will_Genia
I actually find it quite ignorant and disrespecful from you to just lump in PNG and Africa, why? 'because they are all black?".
I have lots of respect to you as a poster, but please, we are in the 21st century so try and tone down the ingrained racism. Through education, you will learn the difference between Samoa and tonga, a little Sub Saharan black from Zimbabwe as opposed to a big west african black from nigeria.
You will learn just how far png is from Africa, yet how close they are physically and mentally to Aboriginals.