CREATE TABLE "race" (
  "driver" text,
  "constructor" text,
  "laps" real,
  "time_retired" text,
  "grid" text
);

Question: Which driver had a grid number of 18?
SQL: SELECT "driver" FROM "race" WHERE "grid"='18';

Question: Which constructor had Shinji Nakano as a driver?
SQL: SELECT "constructor" FROM "race" WHERE "driver"='shinji nakano';