Table: cfl_all_star_game
Columns: season
date
venue
city
visitor
score
home
attendance

Question: In 1958, what has the IRFU All-Stars Home Venue?
SQL: SELECT "venue" FROM cfl_all_star_game WHERE "home" = 'irfu all-stars' AND "season" = 1958

Question: On what Date was the Venue at Exhibition Stadium?
SQL: SELECT "date" FROM cfl_all_star_game WHERE "venue" = 'exhibition stadium'

Question: Before 1957, what was the largest in Attendance at Varsity Stadium?
SQL: SELECT MAX("attendance") FROM cfl_all_star_game WHERE "season" < 1957 AND "venue" = 'varsity stadium'