CREATE TABLE "1970s" (
  "year" text,
  "channel" text,
  "play_by_play" text,
  "color_commentator_s" text,
  "studio_host" text
);

Question: What year was the play-by-play for Don Earle?
SQL: SELECT "year" FROM "1970s" WHERE "play_by_play"='don earle';