CREATE TABLE "1973_enlargement" (
  "member_countries" text,
  "population" text,
  "area_km" text,
  "gdp_billion_us" text,
  "gdp_per_capita_us" text
);

Question: What is the GDP of the nation with 56,210,000 people?
SQL: SELECT "gdp_per_capita_us" FROM "1973_enlargement" WHERE "population"='56,210,000';

Question: What is the area of the nation with GDP per capita (US$) of 11,929?
SQL: SELECT "area_km" FROM "1973_enlargement" WHERE "gdp_per_capita_us"='11,929';

Question: What is the population of the nation that has a GDP per capita (US$) of 11,929?
SQL: SELECT "population" FROM "1973_enlargement" WHERE "gdp_per_capita_us"='11,929';

Question: What is the Population of the nation that has an Area (km²) of 70,273?
SQL: SELECT "population" FROM "1973_enlargement" WHERE "area_km"='70,273';

Question: What is the Population of the nation that has a Member countries consisting of existing members (1973)?
SQL: SELECT "population" FROM "1973_enlargement" WHERE "member_countries"='existing members (1973)';