SELECT T2.Language FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code = T2.CountryCode WHERE T1.HeadOfState = "Beatrix" AND T2.IsOfficial = "T"
Apa bahasa resmi yang digunakan di negara yang kepala negara bagian Beatrix?
CREATE TABLE country (Code VARCHAR, HeadOfState VARCHAR); CREATE TABLE countrylanguage (Language VARCHAR, CountryCode VARCHAR, IsOfficial VARCHAR)