CREATE TABLE table_name_81 (country VARCHAR2, place VARCHAR2, score VARCHAR2)

What country was the player from who placed t3 with a score of 70-68=138?
SELECT country FROM table_name_81 WHERE place = "t3" AND score = 70 - 68 = 138
SELECT "country" FROM "table_name_81" WHERE "place" = "t3" AND "score" = FALSE