Table: t_2006_fei_world_equestrian
Columns: nation
gold
silver
bronze
total

Question: What nation has 1 bronze and 3 silvers?
SQL: SELECT "nation" FROM t_2006_fei_world_equestrian WHERE "bronze" = '1' AND "silver" = '3'

Question: How many total medals for the netherlands?
SQL: SELECT SUM("total") FROM t_2006_fei_world_equestrian WHERE "nation" = 'netherlands'