rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 brazil 9 0 0 9
how many nations are there ?
WRB JJ NNS VBD-AUX EX .
8
Keyword Keyword Keyword Column Keyword Keyword Keyword
select count ( c2 ) from w
Keyword Keyword Column None None None
['agg', 'agg_count'] ['agg', 'agg_count'] c2