CREATE TABLE "washington_redskins_draft_history" (
  "round" real,
  "pick" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);

Question: What is Central Michigan's average overall when the pick was 8?
SQL: SELECT AVG("overall") FROM "washington_redskins_draft_history" WHERE "college"='central michigan' AND "pick"=8;