what is the difference between the number of total medals the first place nation won and the total number of medals the second place nation won?
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col : rank | nation | gold | silver | bronze | total row 1 : 1 | great britain (gbr) | 6 | 3 | 2 | 11 row 2 : 2 | south africa (rsa) | 1 | 2 | 1 | 4 row 3 : 3 | canada (can) | 1 | 1 | 0 | 2 row 4 : 4 | australia (aus) | 0 | 1 | 1 | 2 row 5 :  | hong kong (hkg) | 0 | 1 | 1 | 2 row 6 : 6 | israel (isr) | 0 | 0 | 2 | 2 row 7 : 7 | south korea (kor) | 0 | 0 | 1 | 1
what is the difference between the number of total medals the first place nation won and the total number of medals the second place nation won?
Rank Nation Gold Silver Bronze Total
1 Great Britain (GBR) 6 3 2 11
2 South Africa (RSA) 1 2 1 4
3 Canada (CAN) 1 1 0 2
4 Australia (AUS) 0 1 1 2
Hong Kong (HKG) 0 1 1 2
6 Israel (ISR) 0 0 2 2
7 South Korea (KOR) 0 0 1 1
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