Table: south_america_gdp
Columns: south_american_rank
world_rank
nation
2011_imf
2008_cia_factbook

Question: Name the least world rank for south american rank 3
SQL: SELECT MIN("world_rank") FROM south_america_gdp WHERE "south_american_rank" = 3

Question: Name the south american rank for venezuela
SQL: SELECT MIN("south_american_rank") FROM south_america_gdp WHERE "nation" = 'Venezuela'