English, please.
select t1.city from city as t1 join hosting_city as t2 on t1.city_id = t2.host_city group by t2.host_city having count ( * ) > 1
What is the GDP and population of Nanjing （Jiangsu）?
select distinct t1.gdp, t1.regional_population from city as t1 join hosting_city as t2 on t1.city_id = t2.host_city where t1.city = 'Nanjing ( jiangsu ) '
What is the name of the city in English and Hanzi that hosted in 2011?
select t1.city ,t1.hanzi from city as t1 join hosting_city as t2 on t1.city_id = t2.host_city where t2.year = 2011