[['sport', 'event', 'nation', 'gold', 'silver', 'bronze', 'total'], ['swimming', "women 's 50 m freestyle", 'brazil (bra)', '↓ 1', '↔', '↑ 1', '↔'], ['swimming', "women 's 50 m freestyle", 'venezuela (ven)', '↑ 1', '↓ 1', '↔', '↔'], ['swimming', "women 's 50 m freestyle", 'puerto rico (pur)', '↔', '↑ 1', '↓ 1', '↔'], ['swimming', "women 's 100 m freestyle", 'brazil (bra)', '↓ 1', '↑ 1', '↓ 1', '↓ 1'], ['swimming', "women 's 100 m freestyle", 'venezuela (ven)', '↑ 1', '↓ 1', '↔', '↔'], ['swimming', "women 's 100 m freestyle", 'puerto rico (pur)', '↔', '↔', '↑ 1', '↑ 1'], ['swimming', "women 's 4x100 m freestyle", 'brazil (bra)', '↔', '↓ 1', '↔', '↓ 1'], ['swimming', "women 's 4x100 m freestyle", 'canada (can)', '↔', '↑ 1', '↓ 1', '↔'], ['swimming', "women 's 4x100 m freestyle", 'venezuela (ven)', '↔', '↔', '↑ 1', '↑ 1'], ['swimming', "women 's 4x100 m medley relay", 'brazil (bra)', '↔', '↔', '↓ 1', '↓ 1'], ['swimming', "women 's 4x100 m medley relay", 'bahamas (bah)', '↔', '↔', '↑ 1', '↑ 1'], ['cycling', "men 's road individual time trial", 'colombia (col)', '↔', '↓ 1', '↔', '↓ 1'], ['cycling', "men 's road individual time trial", 'argentina (arg)', '↔', '↑ 1', '↓ 1', '↔'], ['cycling', "men 's road individual time trial", 'canada (can)', '↔', '↔', '↑ 1', '↑ 1'], ['weightlifting', "men 's 105 kg category", 'brazil (bra)', '↔', '↔', '↓ 1', '↓ 1'], ['weightlifting', "men 's 105 kg category", 'argentina (arg)', '↔', '↔', '↑ 1', '↑ 1'], ['total', 'total', 'argentina (arg)', '↔', '↑ 1', '↔', '↑ 1'], ['total', 'total', 'bahamas (bah)', '↔', '↔', '↑ 1', '↑ 1'], ['total', 'total', 'brazil (bra)', '↓ 2', '↔', '↓ 2', '↓ 4'], ['total', 'total', 'canada (can)', '↔', '↑ 1', '↔', '↑ 1'], ['total', 'total', 'colombia (col)', '↔', '↓ 1', '↔', '↓ 1'], ['total', 'total', 'puerto rico (pur)', '↔', '↑ 1', '↔', '↑ 1'], ['total', 'total', 'venezuela (ven)', '↑ 2', '↓ 2', '↑ 1', '↑ 1']]
the only country that did not lose any Medal was the Bahamas
the only country that did not lose any [ENT] was the [ENT]