CREATE TABLE table_name_45 (surface VARCHAR, date VARCHAR, opponent_in_the_final VARCHAR)

What is Surface, when Date is less than 1979, and when Opponent in the Final is 'Bill Scanlon'?
SELECT surface FROM table_name_45 WHERE date < 1979 AND opponent_in_the_final = "bill scanlon"
SELECT "surface" FROM "table_name_45" WHERE "bill scanlon" = "opponent_in_the_final" AND "date" < 1979