Find the number of trains starting from each origin.
SELECT origin ,  count(*) FROM train GROUP BY origin
SELECT origin ,  count(*) FROM train GROUP BY origin
[{'origin': 'Bangalore', 'count(*)': 1}, {'origin': 'Chennai', 'count(*)': 2}, {'origin': 'Guruvayur', 'count(*)': 1}, {'origin': 'Kanniyakumari', 'count(*)': 2}, {'origin': 'Madurai', 'count(*)': 1}, {'origin': 'Mumbai', 'count(*)': 1}, {'origin': 'Nagercoil', 'count(*)': 1}, {'origin': 'Quilon', 'count(*)': 1}, {'origin': 'Trivandrum', 'count(*)': 1}]