In heat rank 7, what is the sum of lanes?
CREATE TABLE table_name_48 (lane INTEGER, heat_rank VARCHAR)
SELECT SUM(lane) FROM table_name_48 WHERE heat_rank = 7
### Context: CREATE TABLE table_name_48 (lane INTEGER, heat_rank VARCHAR) ### Question: In heat rank 7, what is the sum of lanes? ### Answer: SELECT SUM(lane) FROM table_name_48 WHERE heat_rank = 7