CREATE TABLE artist (artist_name VARCHAR)
CREATE TABLE song (artist_name VARCHAR, languages VARCHAR)

Return the names of singers who are from UK and released an English song.
SELECT artist_name FROM artist WHERE country = "UK" INTERSECT SELECT T1.artist_name FROM artist AS T1 JOIN song AS T2 ON T1.artist_name = T2.artist_name WHERE T2.languages = "english"
SELECT "artist_name" FROM "artist" WHERE "UK" = "country" INTERSECT SELECT "T1"."artist_name" FROM "artist" AS "T1" JOIN "song" AS "T2" ON "T1"."artist_name" = "T2"."artist_name" AND "T2"."languages" = "english"