Show the city and the number of branches opened before 2010 for each city.
SELECT city ,  count(*) FROM branch WHERE open_year  <  2010 GROUP BY city
SELECT city ,  count(*) FROM branch WHERE open_year  <  2010 GROUP BY city
[{'City': 'London', 'count(*)': 2}, {'City': 'Oxford', 'count(*)': 2}]