-- Database schema
| swimmer : ID [ INT ] primary_key , name [ TEXT ] , Nationality [ TEXT ] , meter_100 [ INT ] , meter_200 [ TEXT ] , meter_300 [ TEXT ] , meter_400 [ TEXT ] , meter_500 [ TEXT ] , meter_600 [ TEXT ] , meter_700 [ TEXT ] , Time [ TEXT ] | stadium : ID [ INT ] primary_key , name [ TEXT ] , Capacity [ INT ] , City [ TEXT ] , Country [ TEXT ] , Opening_year [ INT ] | event : ID [ INT ] primary_key , Name [ TEXT ] , Stadium_ID [ INT ] event.Stadium_ID = stadium.ID , Year [ TEXT ] | record : ID [ INT ] , Result [ TEXT ] , Swimmer_ID [ INT ] primary_key record.Swimmer_ID = swimmer.ID , Event_ID [ INT ] record.Event_ID = event.ID |
-- -- What is the name of the stadium which held the most events?

SELECT t1.name FROM stadium AS t1 JOIN event AS t2 ON t1.id  =  t2.stadium_id GROUP BY t2.stadium_id ORDER BY count(*) DESC LIMIT 1;