rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 nigeria 13 5 6 24
nigeria has the most gold medals , but who has the most medals overall ?
NNP VBD-AUX DT RBS JJ NNS , CC WP VBD-AUX DT RBS NNS RB .
South Africa
select c2 from w order by c6_number desc limit 1