What the average silver that have one gold greater 3, soviet union (urs) nation, and one bronze greater 26?
Rank Nation Gold Silver Bronze Total
Artistic gymnastics at the Summer Olympics
18907412
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Women
Women
1 Soviet Union (URS) 33 29 26 88
2 Romania (ROU) 22 15 20 57
3 United States (USA) 5 10 10 25
4 Hungary (HUN) 7 6 10 23
5 Czechoslovakia (TCH) 9 6 1 16
6 Russia (RUS) 4 5 4 13
7 East Germany (GDR) 3 10 7 20
8 China (CHN) 3 4 5 12
9 Unified Team (EUN) 3 1 2 6
10 Ukraine (UKR) 2 1 0 3
11 Sweden (SWE) 1 1 1 3
12 France (FRA) 1 0 0 1
12 Germany (GER) 1 0 0 1
12 Netherlands (NED) 1 0 0 1
15 Unified Team of Germany (EUA) 0 1 0 1
15 Italy (ITA) 0 1 0 1
17 Bulgaria (BUL) 0 0 1 1
17 Great Britain (GBR) 0 0 1 1
17 Japan (JPN) 0 0 1 1
17 Poland (POL) 0 0 1 1
17 Spain (ESP) 0 0 1 1
SELECT AVG Silver FROM table WHERE Gold > 3 AND Nation = soviet union (urs) AND Bronze > 26
3 soviet union (urs) 26