CREATE TABLE table_name_51 (player VARCHAR(255), country VARCHAR(255), place VARCHAR(255), score VARCHAR(255))
What is Player, when Country is "United States", when Place is "T10", and when Score is "68-71=139"?
    
SQL: SELECT player FROM table_name_51 WHERE country = "united states" AND place = "t10" AND score = 68 - 71 = 139