Simplify the following text for a Grade 8 native English-speaking person.
Original: Both australopithecines and Homo sapiens are part of the tribe Hominini , but recent data has brought into doubt the position of A. africanus as a direct ancestor of modern humans ; it may well have been a cousin .
Simplified: Both Australopithecines and Homo sapiens are part of the tribe Hominini . Recent data suggests Australopithecines were a diverse group and that A. africanus may not be a direct ancestor of modern humans .