Find the name and capacity of the stadium where the event named "World Junior" happened.
return stadiums ;return events of #1 ;return name of #2 ;return #1 where #3 is World Junior ;return name of #4 ;return capacity of #4 ;return #5 ,  #6
['select', 'project', 'project', 'comparative', 'project', 'project', 'union']