CREATE TABLE "semifinal_2" (
  "rank" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" text
);

Question: What is the number of the rank when the time is 2:15.98, in a lane larger than 7?
SQL: SELECT COUNT("rank") FROM "semifinal_2" WHERE "time"='2:15.98' AND "lane">7;

Question: What is the number of the rank for the name of Chen Yan in a lane less than 2?
SQL: SELECT COUNT("rank") FROM "semifinal_2" WHERE "name"='chen yan' AND "lane"<2;

Question: What is the smallest lane for rank 6?
SQL: SELECT MIN("lane") FROM "semifinal_2" WHERE "rank"=6;