CREATE TABLE table_name_80 (score VARCHAR, player VARCHAR, country VARCHAR, place VARCHAR)
SELECT score FROM table_name_80 WHERE country = "united states" AND place = "t1" AND player = "david duval"
คะแนนของสหรัฐอเมริกาในตำแหน่ง T1 ของ David Duval คืออะไร?
What is the score for the United States in place T1 for David Duval?