Database: concert_singer
Question: Show the stadium name and capacity with most number of concerts in year 2014 or after.
SQL: select t2.name ,  t2.capacity from concert as t1 join stadium as t2 on t1.stadium_id  =  t2.stadium_id where t1.year  >=  2014 group by t2.stadium_id order by count(*) desc limit 1