Table: icf_1986_canoe_sprint
Columns: rank
nation
gold
silver
bronze
total

Question: How many bronze medals for the United Kingdom when the silver was less than 0?
SQL: SELECT AVG("bronze") FROM icf_1986_canoe_sprint WHERE "nation" = 'united kingdom' AND "silver" < 0

Question: How many bronze medals for West Germany having a total more than 2?
SQL: SELECT COUNT("bronze") FROM icf_1986_canoe_sprint WHERE "total" > 2 AND "nation" = 'west germany'

Question: What is the amount of silver for rank 11 having less than 0 gold?
SQL: SELECT MIN("silver") FROM icf_1986_canoe_sprint WHERE "rank" = '11' AND "gold" < 0

Question: What rank is Bulgaria with less than 3 silver and more than 1 bronze?
SQL: SELECT "rank" FROM icf_1986_canoe_sprint WHERE "silver" < 3 AND "bronze" > 1 AND "nation" = 'bulgaria'