Table schema:
CREATE TABLE table_name_27 (nanquan INTEGER, total VARCHAR, nandao VARCHAR, rank VARCHAR)

Question: Which Nanquan has a Nandao smaller than 9.44, and a Rank smaller than 9, and a Total larger than 18.68?
SQL: SELECT MIN(nanquan) FROM table_name_27 WHERE nandao < 9.44 AND rank < 9 AND total > 18.68