Find the total number of students enrolled in the colleges that were founded after the year of 1850 for each affiliation type.
SELECT sum(Enrollment) ,  affiliation FROM university WHERE founded  >  1850 GROUP BY affiliation
SELECT sum(Enrollment) ,  affiliation FROM university WHERE founded  >  1850 GROUP BY affiliation
[{'sum(Enrollment)': 2100.0, 'Affiliation': 'Private/Methodist'}, {'sum(Enrollment)': 43092.0, 'Affiliation': 'Public'}]