rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
first second
number
number
number
number
number text(text) number number number number
1 china (chn) 14 10 12 36
what is the total number of nations that participated in the beach games of 2012 ?
WP VBD-AUX DT JJ NN IN NNS WDT VBD IN DT NNP NNS IN CD .
23
select count ( c2 ) from w