CREATE TABLE table_15918 ("Country  (  exonym  ) " TEXT, "Capital  (  exonym  ) " TEXT, "Country  (  endonym  ) " TEXT, "Capital  (  endonym  ) " TEXT, "Official or native language ( s )   ( alphabet/script ) " TEXT)

What is the capital (endonym) where Douglas is the Capital (exonym)?
SELECT "Capital ( endonym )" FROM table_15918 WHERE "Capital ( exonym )" = 'Douglas'
SELECT "Capital ( endonym )" FROM "table_15918" WHERE "Capital ( exonym )" = 'Douglas'