user: Question: Who was the writer when Parkville Pictures Ltd was the recipient?
Columns: ['Director(s)', 'Writer(s)', 'Recipient', 'Date', 'Award']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Edward Jeffreys', 'Edward Jeffreys', 'Signal Films', '12/03/2008', '£4,270']
SQL:

assistant: SELECT "Writer(s)" FROM "Table" WHERE "Recipient" = 'Parkville Pictures Ltd';