table: [['rank', 'nation', 'gold', 'silver', 'bronze', 'total'], ['1', 'canada (can)', '2', '0', '0', '2'], ['2', 'australia (aus)', '0', '1', '0', '1'], ['2', 'netherlands (ned)', '0', '1', '0', '1'], ['4', 'united states (usa)', '0', '0', '1', '1'], ['4', 'japan (jpn)', '0', '0', '1', '1']]
ref: there are 2 set of Nation that share the same Rank
template: there are 2 set of [ENT] that share the same [ENT]