user: Question: What record was set by Walter Brennan before 1941?
Columns: ['Superlative', 'Actor', 'Record Set', 'Year', 'Notes']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Most Awards', 'Walter Brennan', '3 awards', 1940.0, 'Awards resulted from 4 nominations.']
SQL:

assistant: SELECT "Record Set" FROM "Table" WHERE "Actor" = 'Walter Brennan' AND "Year" < 1941.0;