SELECT DISTINCT T1.age FROM management AS T2 JOIN head AS T1 ON T1.head_id  =  T2.head_id WHERE T2.temporary_acting  =  'Yes'
What are the distinct ages of the heads who are acting?
SELECT DISTINCT T1.age FROM management AS T2 JOIN head AS T1 ON T1.head_id = T2.head_id WHERE T2.temporary_acting = 'Yes '
select distinct t1 . age from management as t2 join head as t1 on t1 . head_id = t2 . head_id where t2 . temporary_acting = value
What are the distinct ages of the heads who are acting ?