user: Question: Name the poll winner for March 19, 2008
Columns: ['#', 'Advocate # 1', 'Advocate # 2', 'Root of All Evil', 'Poll winner', 'Original air date']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Paul F. Tompkins for Oprah', 'Greg Giraldo for Catholic Church', 'Oprah', 'Catholic Church', 'March 12, 2008']
SQL:

assistant: SELECT "Poll winner" FROM "Table" WHERE "Original air date" = 'March 19, 2008';