"Mama Khoza" spends most of her weekends at graveyards, not really to honour those who have already moved on, but as she puts it "to bury the cream of Mamelodi". "I told someone last week. We are burying the cream of Mamelodi - youngsters who are in the process of completing their degrees," says Veronica Khoza, a retired nurse, who now runs Tateni, a community-based home care project.