Complex sentence: During the town's boom years from the 1879 to 1880, Ottoshoop was, however, the commercial capital of South Africa whose nucleus still live on in today's commercial capital of Africa-Johannesburg.
Split into simpler sentences: During the town's boom years from the 1879 to 1880, Ottoshoop was, however, the commercial capital of South Africa. This spirit of the town still lives on in today's commercial capital of Africa-Johannesburg.