How many grids have 102 laps and a Time/Retired of + 6.18?
CREATE TABLE "classification" (
  "driver" text,
  "constructor" text,
  "laps" real,
  "time_retired" text,
  "grid" real
);
SELECT COUNT("grid") FROM "classification" WHERE "laps">102 AND "time_retired"='+ 6.18';