Task: Question Understanding
Input (English): Context : Leônidas da Silva (Portuguese pronunciation: (leˈõnidɐz dɐ ˈsiwvɐ); 6 September 1913, Rio de Janeiro -- 24 January 2004, Cotia) was an association footballer and commentator. 
Question : What disease was a factor in the death of Leônidas?
Output (English): medical condition