rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 venezuela 7 4 3 14
calculate the difference in the number of gold medals won between venezuela and colombia .
VB DT NN IN DT NN IN NN NNS VBD IN NNP CC NNP .
7
select ( select c3_number from w where c2 = 'venezuela' ) - ( select c3_number from w where c2 = 'colombia' )