Question: when was the first open heart surgery done
Answer: 1893; 1893; 1893-07-09; 07 09 1893; 09 07 1893; 1893 July 09; 09/07/1893; 07-09-1893; 09 July 1893; 1893 July, 09; 07/09/1893; 1893-07-09; 1893 07 09; 09-07-1893