user: ### NOW ANSWER:
Question: Who did the play-by-play when the pregame host was Brian Williams and the sideline reporters were Steve Armitage and Brenda Irving?
Columns: ['Year', 'Network', 'Play-by-play', 'Colour commentator(s)', 'Sideline reporters', 'Pregame host', 'Pregame analysts']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2009.0, 'TSN', 'Chris Cuthbert', 'Glen Suitor', 'Sara Orlesky and Farhan Lalji', 'Dave Randorf and Brian Williams', 'Jock Climie , Matt Dunigan and Chris Schultz']
SQL:

assistant: SELECT "Play-by-play" FROM "Table" WHERE "Pregame host" = 'Brian Williams' AND "Sideline reporters" = 'Steve Armitage and Brenda Irving';