What is the average of the top-25 of those with less than 35 events in the Open Championship?
CREATE TABLE "summary" (
  "tournament" text,
  "wins" real,
  "top_10" real,
  "top_25" real,
  "events" real,
  "cuts_made" real
);
SELECT AVG("top_25") FROM "summary" WHERE "events"<35 AND "tournament"='the open championship';