user: Question: Who made the comments for radio broadcast when Jan Gabrielsson made them for television broadcast?
Columns: ['Year(s)', 'Television commentator', 'Dual Television commentator', 'Radio commentator', 'Spokesperson']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1957.0, 'Nils Linnman', 'Dual television commentator introduced in 1992', 'Radio broadcast began in 1958', 'Sweden began participating in 1958']
SQL:

assistant: SELECT "Radio commentator" FROM "Table" WHERE "Television commentator" = 'Jan Gabrielsson';