col : rank | nation | gold | silver | bronze | total row 1 : 1 | cuba | 4 | 3 | 2 | 9 row 2 : 2 | canada | 4 | 2 | 1 | 7 row 3 : 3 | united states | 2 | 0 | 2 | 4 row 4 : 4 | mexico | 1 | 1 | 0 | 2 row 5 : 5 | ecuador | 1 | 0 | 0 | 1 row 6 : 6 | argentina | 0 | 4 | 3 | 7 row 7 : 7 | brazil | 0 | 2 | 2 | 4 row 8 : 8 | chile | 0 | 0 | 1 | 1 row 9 : 8 | venezuela | 0 | 0 | 1 | 1 row 10 : total | total | 12 | 12 | 12 | 36
which nations competed in the 2011 pan american games? of these nations which ones won gold? which nation of the ones that won gold did not win silver?
united states
Rank Nation Gold Silver Bronze Total
which nation of the ones that won gold did not win silver?
1 Cuba 4 3 2 9
2 Canada 4 2 1 7
3 United States 2 0 2 4
4 Mexico 1 1 0 2
5 Ecuador 1 0 0 1
6 Argentina 0 4 3 7
7 Brazil 0 2 2 4
8 Chile 0 0 1 1
8 Venezuela 0 0 1 1
Total Total 12 12 12 36
United States
which nation of the ones that won gold did not win silver? || of these nations which ones won gold? | which nations competed in the 2011 pan american games?