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
what is the number of silver medals won by peru and ecuador combined ?
WP VBD-AUX DT NN IN NN NNS VBN IN NNP CC NNP VBN .
4
select sum ( c4_number ) from w where c2 in ( 'peru' , 'ecuador' )