rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 south korea 9 2 1 12
how many countries total only received one bronze medal in the 1987 championship ?
WRB JJ NNS VBP RB VBN CD NN NN IN DT CD NN .
11
select count ( c2 ) from w where c5_number = 1