CREATE TABLE "semifinal_1" (
  "rank" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" text
);

Question: What did Ku Hyo-Jin rank?
SQL: SELECT COUNT("rank") FROM "semifinal_1" WHERE "name"='ku hyo-jin';

Question: What was the rank of the person who swam in Lane 7 with a time of 2:25.86?
SQL: SELECT SUM("rank") FROM "semifinal_1" WHERE "time"='2:25.86' AND "lane"<7;