Complex sentence: Khoi pastoralists apparently arrived in Southern Africa shortly before the Bantu; over time, some abandoned pastoralism and adopted the hunter-gatherer economy of the San, likely due to a drying climate, and are now considered San.
Split into simpler sentences: Khoi pastoralists apparently arrived in Southern Africa shortly before the Bantu. Over time, some Khoi abandoned pastoralism and adopted the hunter-gatherer economy of the San, likely due to a drying climate, and are now considered San.