user: Question: Who did the play-by-play on the CBC network before 1961?
Columns: ['Year', 'Network', 'Play-by-play', 'Colour commentator(s)', 'Studio host']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1969.0, 'CBC', 'Danny Gallivan', 'Dick Irvin, Jr.', 'Ward Cornell']
SQL:

assistant: SELECT "Play-by-play" FROM "Table" WHERE "Network" = 'CBC' AND "Year" < 1961.0;