CREATE TABLE "references" (
  "play" text,
  "author" text,
  "company" text,
  "base" text,
  "country" text
);

Question: Which base has a company of Theatro Technis Karolos Koun?
SQL: SELECT "base" FROM "references" WHERE "company"='theatro technis karolos koun';

Question: Which company has an author of Aristophanes and play of Plutus?
SQL: SELECT "company" FROM "references" WHERE "author"='aristophanes' AND "play"='plutus';

Question: Which author has a company of the Semeio Theatre?
SQL: SELECT "author" FROM "references" WHERE "company"='semeio theatre';

Question: Which play was done by the Radu Stanca National Theatre company?
SQL: SELECT "play" FROM "references" WHERE "company"='radu stanca national theatre';

Question: Which play had a base of Aosta?
SQL: SELECT "play" FROM "references" WHERE "base"='aosta';

Question: What is the country of the play based in Athens at the Attis Theatre company?
SQL: SELECT "country" FROM "references" WHERE "base"='athens' AND "company"='attis theatre';