Table schema:
CREATE TABLE country (Name VARCHAR, Code VARCHAR); CREATE TABLE countrylanguage (CountryCode VARCHAR, Language VARCHAR)

Question: What are the names of nations speak both English and French?
SQL: SELECT T1.Name FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code = T2.CountryCode WHERE T2.Language = "English" INTERSECT SELECT T1.Name FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code = T2.CountryCode WHERE T2.Language = "French"