Question: Which ethnic group which Tonga people of Zambia and Zimbabwe belong inhabit a geographical area stretching east and southward from Central Africa across the African Great Lakes region down to Southern Africa?
Sentence (from "Bantu peoples"): There are about 650 Bantu languages by the criterion of mutual intelligibility, though the distinction between language and dialect is often unclear, and "Ethnologue" counts 535 languages.
Relevant evidence: No