What is the lane with a time of 1:56.64, and a tank smaller than 7?
CREATE TABLE "semifinal_1" (
  "rank" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" text
);
SELECT COUNT("lane") FROM "semifinal_1" WHERE "time"='1:56.64' AND "rank"<7;