Table: nhl_all_star_broadcasts
Columns: year
network
play_by_play
colour_commentator_s
studio_host

Question: Who gave the play by play commentary with studio host Ward Cornell?
SQL: SELECT "play_by_play" FROM nhl_all_star_broadcasts WHERE "studio_host" = 'ward cornell'

Question: Were the color commentators who worked with Bill Hewitt doing the play-by-play?
SQL: SELECT "colour_commentator_s" FROM nhl_all_star_broadcasts WHERE "play_by_play" = 'bill hewitt'

Question: Who did the play-by-play with studio host Ward Cornell and color commentator Bob Goldham?
SQL: SELECT "play_by_play" FROM nhl_all_star_broadcasts WHERE "studio_host" = 'ward cornell' AND "colour_commentator_s" = 'bob goldham'

Question: Who did the play-by-play on the CBC network before 1961?
SQL: SELECT "play_by_play" FROM nhl_all_star_broadcasts WHERE "network" = 'cbc' AND "year" < 1961