Table:
text: 1987 World Taekwondo Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total_
1 South Korea 9 2 1 12
2 Chinese Taipei 2 3 3 8
3 Spain 1 5 4 10
4 United States 1 2 7 10
5 Turkey 1 1 2 4
6 West Germany 1 0 3 4
7 Netherlands 1 0 1 2
8 Mexico 0 2 1 3
9 Indonesia 0 1 0 1
10 France 0 0 2 2
11 Australia 0 0 1 1
11 Canada 0 0 1 1
11 Ivory Coast 0 0 1 1
11 Denmark 0 0 1 1
11 Italy 0 0 1 1

text: 1987 World Taekwondo Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total_
11 Jordan 0 0 1 1
11 Nepal 0 0 1 1
11 Switzerland 0 0 1 1

text: 1987 World Taekwondo Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total_
1 South Korea 9 2 1 12
2 Chinese Taipei 2 3 3 8
3 Spain 1 5 4 10
4 United States 1 2 7 10
5 Turkey 1 1 2 4
6 West Germany 1 0 3 4
7 Netherlands 1 0 1 2
8 Mexico 0 2 1 3
9 Indonesia 0 1 0 1
10 France 0 0 2 2
11 Australia 0 0 1 1
11 Canada 0 0 1 1
11 Ivory Coast 0 0 1 1
11 Denmark 0 0 1 1
11 Italy 0 0 1 1

text: 1987 World Taekwondo Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total_
11 Jordan 0 0 1 1
11 Nepal 0 0 1 1
11 Switzerland 0 0 1 1

Question: Which nations had a gold medal but not a silver medal at the 1987 World Taekwondo Championships?