What are the investors of entrepreneurs and the corresponding number of entrepreneurs invested by each investor?
SELECT Investor ,  COUNT(*) FROM entrepreneur GROUP BY Investor
SELECT Investor ,  COUNT(*) FROM entrepreneur GROUP BY Investor
[{'Investor': 'Doug Richard', 'COUNT(*)': 1}, {'Investor': 'Duncan Bannatyne', 'COUNT(*)': 2}, {'Investor': 'Peter Jones', 'COUNT(*)': 1}, {'Investor': 'Rachel Elnaugh', 'COUNT(*)': 1}, {'Investor': 'Simon Woodroffe', 'COUNT(*)': 1}]