user: Question: Who called the race in 1978?
Columns: ['Year', 'Network', 'Race caller', 's Host', 's Analyst', 'Reporters', 'Trophy presentation']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1979.0, 'CBS', 'Marshall Cassidy', 'Jack Whitaker', 'Frank I. Wright and Jimmy Snyder', 'Phyllis George and Charlsie Cantey', 'Jack Whitaker']
SQL:

assistant: SELECT "Race caller" FROM "Table" WHERE "Year" = 1978.0;