Johannesburg - President Mandela's ex-wife, Ms Winnie Madikizela-Mandela, is to continue giving evidence before a session of the South African truth commission today. She began giving evidence on September 26th on the disappearance of youths during the 1980s, but did not complete her testimony. The Truth and Reconciliation Commission has said it will question her on 18 instances of serious human rights violations. At least eight of these cases relate to the murder of black teenagers suspected of collaborating with the then apartheid authorities.