What are the different affiliations, and what is the total enrollment of schools founded after 1850 for each enrollment 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'}]