Which country has a GDP (nominal) of $29.9 billion?
CREATE TABLE "prospective_members" (
  "country" text,
  "population" text,
  "area_km" text,
  "gdp_nominal" text,
  "gdp_per_capita_nominal" text
);
SELECT "country" FROM "prospective_members" WHERE "gdp_nominal"='$29.9 billion';