user: Question: What is the propulsion for the RB 04 earlier than 1962?
Columns: ['Name', 'Year', 'Propulsion', 'launched by', 'Country']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Fritz X', 1943.0, 'none', 'Air', 'DE']
SQL:

assistant: SELECT "Propulsion" FROM "Table" WHERE "Year" < 1962.0 AND "Name" = 'RB 04';