user: Question: Who was awarded after 1947 in the category of, the Best Actor in a Leading Role?
Columns: ['Year', 'Award', 'Result', 'Category', 'Film']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1945.0, 'Academy Award', 'Nominated', 'Best Supporting Actor', 'Laura']
SQL:

assistant: SELECT "Award" FROM "Table" WHERE "Year" > 1947.0 AND "Category" = 'Best Actor in a Leading Role';