Which rd. took place at Hockenheimring?
CREATE TABLE table_1137718_2 (rd INTEGER, location VARCHAR)
SELECT MIN(rd) FROM table_1137718_2 WHERE location = "Hockenheimring"
### Context: CREATE TABLE table_1137718_2 (rd INTEGER, location VARCHAR) ### Question: Which rd. took place at Hockenheimring? ### Answer: SELECT MIN(rd) FROM table_1137718_2 WHERE location = "Hockenheimring"