CREATE TABLE table_71671 ("Date" CLOB, "Venue" CLOB, "Score" CLOB, "Result" CLOB, "Competition" CLOB)

Which friendly competition took place on 19 April 1979?
SELECT "Score" FROM table_71671 WHERE "Competition" = 'friendly' AND "Date" = '19 april 1979'
SELECT "Score" FROM "table_71671" WHERE "Competition" = 'friendly' AND "Date" = '19 april 1979'