user: Question: How many titles/sources have a developer of Clover Studio?
Columns: ['Title and source', 'Developer', 'Publisher', 'First released', 'Japan', 'Europe', 'North America', 'Exclusive', 'Move-only']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['4 Elements →', 'BooLot Games', 'BooLot Games', '2011-08-30 August 30, 2011', 'N/A N/A', '2011-08-31 August 31, 2011', '2011-08-30 August 30, 2011', 'Yes', 'No']
SQL:

assistant: SELECT COUNT("Title and source") FROM "Table" WHERE "Developer" = 'Clover Studio';