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 7 5 3 15
what was the total difference in medals between the country who won the most and the country who the least ?
WP VBD-AUX DT JJ NN IN NNS IN DT NN WP VBD DT JJS CC DT NN WP DT JJS .