Name the least rank for lane less than 5 for germany and sandra völker
CREATE TABLE "semifinal_1" (
  "rank" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" real
);
SELECT MIN("rank") FROM "semifinal_1" WHERE "lane"<5 AND "nationality"='germany' AND "name"='sandra völker';