What is the id, name and nationality of the architect who built most mills?
SELECT T1.id ,  T1.name ,  T1.nationality FROM architect AS T1 JOIN mill AS T2 ON T1.id  =  T2.architect_id GROUP BY T1.id ORDER BY count(*) DESC LIMIT 1
SELECT T1.id ,  T1.name ,  T1.nationality FROM architect AS T1 JOIN mill AS T2 ON T1.id  =  T2.architect_id GROUP BY T1.id ORDER BY count(*) DESC LIMIT 1
[{'id': '1', 'name': 'Frank Lloyd Wright', 'nationality': 'American'}]