CREATE TABLE table_name_8 (name VARCHAR, pos VARCHAR, date_of_birth VARCHAR)

born on 1973-08-21, what is the cf's name?
SELECT name FROM table_name_8 WHERE pos = "cf" AND date_of_birth = "1973-08-21"
SELECT "name" FROM "table_name_8" WHERE "1973-08-21" = "date_of_birth" AND "cf" = "pos"