ok. What is the venue of the competition "1994 FIFA World Cup qualification" hosted by "Nanjing" ( Jiangsu )"?
SELECT T3.venue FROM city AS T1 JOIN hosting_city AS T2 ON T1.city_id  =  T2.host_city JOIN MATCH AS T3 ON T2.match_id  =  T3.match_id WHERE T1.city  =  "Nanjing  (  Jiangsu  ) " AND T3.competition  =  "1994 FIFA World Cup qualification"
venue of the competition refers to the column venue; competition '1994 FIFA World Cup qualification' refers to filtering with competition = '1994 FIFA World Cup qualification'; hosted by 'Nanjing (Jiangsu)' refers to filtering with city = 'Nanjing (Jiangsu)'; joining tables city, hosting_city, and MATCH to connect city with venue through hosting_city.