Find the venue of the competition "1994 FIFA World Cup qualification" which was 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"