What is the sum of Weeks on Top for the Volume:Issue 34:9-12?
CREATE TABLE "see_also" (
  "volume_issue" text,
  "issue_date_s" text,
  "weeks_on_top" real,
  "song" text,
  "artist" text
);
SELECT SUM("weeks_on_top") FROM "see_also" WHERE "volume_issue"='34:9-12';