CREATE TABLE table_name_96 (score VARCHAR2, competition VARCHAR2, venue VARCHAR2)

What score did vasil levski national stadium, sofia, which was friendly during competition, earn?
SELECT score FROM table_name_96 WHERE competition = "friendly" AND venue = "vasil levski national stadium, sofia"
SELECT "score" FROM "table_name_96" WHERE "competition" = "friendly" AND "vasil levski national stadium, sofia" = "venue"