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
which african country had 8 silver medal wins , but no gold medals ?
WDT JJ NN VBD-AUX CD NN NN VBZ , CC DT NN NNS .
Algeria
select c2 from w where c4_number = 8 and c3_number = 0