user: ### NOW ANSWER:
Question: What is the Enrollment at whitman college Founded after 1859?
Columns: ['Institution', 'Location', 'Founded', 'Affiliation', 'Enrollment', 'Team Nickname', 'Primary conference']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'text']
Sample row: ['Central Washington University', 'Ellensburg, Washington', 1891.0, 'Public', 10400.0, 'Wildcats', 'GNAC ( Division II )']
SQL:

assistant: SELECT AVG("Enrollment") FROM "Table" WHERE "Institution" = 'whitman college' AND "Founded" > 1859.0;