CREATE TABLE "demand" (
  "entities" text,
  "country" text,
  "supply_point" text,
  "voltage_k_v" real,
  "power_mw" real
);

Question: What are all the countries where the electric company Ebisa has a presence?
SQL: SELECT "country" FROM "demand" WHERE "entities"='EBISA';

Question: In how many countries is Itaipu a supply point for electricity?
SQL: SELECT COUNT("country") FROM "demand" WHERE "supply_point"='Itaipu';

Question: What are the electric companies drawing power from Itaipu?
SQL: SELECT "entities" FROM "demand" WHERE "supply_point"='Itaipu';