Complex sentence: He migrated to South Africa in 1889 and taught as a missionary in schools in northern Transvaal Waterval (Nuwe Smitsdorp), was interned at Pinetown during the Second Boer War.
Split into simpler sentences: He migrated to South Africa in 1889 and taught as a missionary in schools in northern Transvaal Waterval (Nuwe Smitsdorp). He was interned at Pinetown during the Second Boer War.