Complex sentence: Mario supported "Krebs kranke Kinder" (Children with cancer) in Hannover in November 2002 and in Paris in June 2012 he supported Lee-Ann Watson-BAN South Africa at the clinic for children with HIV in South Africa.
Split into simpler sentences: Mario supported "Krebs kranke Kinder" (Children with cancer) in Hannover in November 2002. And in Paris in June 2012 he supported Lee-Ann Watson-BAN South Africa at the clinic for children with HIV in South Africa.