Chemba is a ward in the eponymous district of Tanzania. Chemba had 16047 inhabitants at the 2012 census. Lately a lot of additional information has been added to the existing articles (in Swahili or English) to Wikidata.
There are plenty of practical reasons why Chemba is notable. In 2010 I blogged about the "Geograph" project in the UK. Britain was divided by a raster in order to have representative pictures for the whole of the country. Obviously we could do the same for any and all countries in Africa. They do have digital cameras in Africa, maybe not everyone but that is not the point.
Africa is notable and, we want to close the gap in coverage of Africa. So we want to know about all the wards of Tanzania, not just Chemba. We need coordinates, maps and photos. There is census data for 2012 and all this, including maps and photos, can be shared in any language once the data is available in Wikidata.
The point of all this; make obvious what we do know and what we know is missing. In the end, the devil is in the details but Africa is a continent full of bright people who can make the difference.