Table: swimming_2007_world_champs
Columns: heat_rank
lane
swimmer
country
time
overall_rank

Question: I want to know the highest heat rank for overall rank of t63 and time less than 25.47
SQL: SELECT MAX("heat_rank") FROM swimming_2007_world_champs WHERE "overall_rank" = 't63' AND "time" < 25.47

Question: Tell me the country for lane of 6
SQL: SELECT "country" FROM swimming_2007_world_champs WHERE "lane" = 6

Question: Tell me the overall rank for heat rank of 8
SQL: SELECT "overall_rank" FROM swimming_2007_world_champs WHERE "heat_rank" = 8