user: Question: Which award has Thelma Ritter won?
Columns: ['Superlative', 'Actress', 'Record Set', 'Year', 'Notes']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Most Awards', 'Shelley Winters', '2 awards', 1965.0, 'Awards resulted from 3 nominations.']
SQL:

assistant: SELECT "Superlative" FROM "Table" WHERE "Actress" = 'Thelma Ritter';