Table: t_2008_iaaf_world_indoor
Columns: heat
lane
name
country
mark

Question: What is the lowest heat for the United states with a mark of 51.85 pb and lane higher than 6?
SQL: SELECT MIN("heat") FROM t_2008_iaaf_world_indoor WHERE "country" = 'united states' AND "mark" = '51.85 pb' AND "lane" > 6

Question: What is the average lane racheal nachula has when the heat is less than 2?
SQL: SELECT AVG("lane") FROM t_2008_iaaf_world_indoor WHERE "heat" < 2 AND "name" = 'racheal nachula'

Question: What is the average heat that has 52.83 sb mark and lane less than 4?
SQL: SELECT AVG("heat") FROM t_2008_iaaf_world_indoor WHERE "mark" = '52.83 sb' AND "lane" < 4