What are the themes of competitions that have corresponding host cities with more than 1000 residents?
SELECT T2.Theme FROM city AS T1 JOIN farm_competition AS T2 ON T1.City_ID  =  T2.Host_city_ID WHERE T1.Population  >  1000
SELECT T2.Theme FROM city AS T1 JOIN farm_competition AS T2 ON T1.City_ID  =  T2.Host_city_ID WHERE T1.Population  >  1000
[{'Theme': 'Carnival M is back!'}, {'Theme': 'Codehunters'}, {'Theme': 'MTV Asia Aid'}]