CREATE TABLE table_name_51 (player VARCHAR, country VARCHAR, place VARCHAR, score VARCHAR)

What is Player, when Country is 'United States', when Place is 'T10', and when Score is '68-71=139'?
SELECT player FROM table_name_51 WHERE country = "united states" AND place = "t10" AND score = 68 - 71 = 139
SELECT "player" FROM "table_name_51" WHERE "country" = "united states" AND "place" = "t10" AND "score" = FALSE