user: Question: When was the loan started when the coutry is ENG, the loan club is Sunderland and the end source is South Wales Echo?
Columns: ['Name', 'Country', 'Loan Club', 'Started', 'Ended', 'Start Source', 'End Source']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Heaton', 'ENG', 'Manchester United', '5 May', '30 June', 'BBC Sport', 'South Wales Echo']
SQL:

assistant: SELECT "Started" FROM "Table" WHERE "Country" = 'ENG' AND "Loan Club" = 'Sunderland' AND "End Source" = 'South Wales Echo';