Table: olympic_medals_1988
Columns: rank
nation
gold
silver
bronze
total

Question: What is the average rank of west germany (frg), which has more than 1 silver, less than 11 gold, and 2 bronze medals?
SQL: SELECT AVG("rank") FROM olympic_medals_1988 WHERE "silver" > 1 AND "gold" < 11 AND "bronze" = 2 AND "nation" = 'west germany (frg)'