Antelope Mine
They migrated to the then British colony of Southern Rhodesia in the 1950s from Northern Rhodesia ( the present-day Zambia ) and Nyasaland ( now Malawi ) to work as migrant labourers in the mineral extraction and agricultural industries . 
<triplet> Northern Rhodesia <subj> Zambia <obj> replaced by <triplet> Zambia <subj> Northern Rhodesia <obj> replaces