Show the names of editors that are on at least two journal committees.
SELECT T1.Name FROM editor AS T1 JOIN journal_committee AS T2 ON T1.Editor_ID  =  T2.Editor_ID GROUP BY T1.Name HAVING COUNT(*)  >=  2
SELECT T1.Name FROM editor AS T1 JOIN journal_committee AS T2 ON T1.Editor_ID  =  T2.Editor_ID GROUP BY T1.Name HAVING COUNT(*)  >=  2
[{'Name': 'Grażyna Wolszczak'}]