SELECT count(DISTINCT T2.Delegate) FROM county AS T1 JOIN election AS T2 ON T1.County_id  =  T2.District WHERE T1.Population  >  50000
Count the number of distinct delegates who are from counties with population above 50000.
SELECT count ( DISTINCT T2.Delegate ) FROM county AS T1 JOIN election AS T2 ON T1.County_id = T2.District WHERE T1.Population > 50000
select count ( distinct t2 . delegate ) from county as t1 join election as t2 on t1 . county_id = t2 . district where t1 . population > value
Count the number of distinct delegates who are from counties with population above 50000 .