When this news headline is fed into modern tools for Named Entity Disambiguation (NED), virtually all of them would map the mention Schumacher onto the former Formula One champion Michael Schumacher, as the best-fitting entity from a Wikipedia-centric knowledge base (KB).
knowing that Sunday refers to August 14, 1949, i.e., ignoring the surface form but exploiting normalized information, it becomes clear that the text actually refers to the German politician Kurt Schumacher.