CREATE TABLE "1990s" (
  "year" real,
  "network" text,
  "play_by_play" text,
  "colour_commentator_s" text,
  "pregame_host" text
);

Question: For which network was Chris Walby the color commentator after 1990?
SQL: SELECT "network" FROM "1990s" WHERE "year">1990 AND "colour_commentator_s"='chris walby';

Question: Who was the pregame host before 1992 when there was a play by play of Bob Irving?
SQL: SELECT "pregame_host" FROM "1990s" WHERE "year"<1992 AND "play_by_play"='bob irving';