user: Question: What is the psd-pc for 18-22/04/2009?
Columns: ['Polling Firm', 'Date', 'PSD - PC', 'UDMR', 'Elena Băsescu', 'Others', 'Undecided']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Insomar', '26/03-05/04/2009', '31%', '7%', '6%', '1%', 'N/A']
SQL:

assistant: SELECT "PSD - PC" FROM "Table" WHERE "Date" = '18-22/04/2009';