user: ### NOW ANSWER:
Question: WHAT CANDIDATE HAD A MARGIN OF ERROR OF ± 4.5%, WHEN PAT TOOMEY WAS 45% AND JOE SESTAK WAS 38%?
Columns: ['Poll source', 'Date(s) administered', 'Sample size', 'Margin of error', 'Joe Sestak (D)', 'Pat Toomey (R)', 'Other', 'Undecided']
Types: ['text', 'text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Research 2000 (report)', 'May 7, 2009', 600.0, '± 4.0%', '37%', '32%', '––', '––']
SQL:

assistant: SELECT "Other" FROM "Table" WHERE "Margin of error" = '± 4.5%' AND "Pat Toomey (R)" = '45%' AND "Joe Sestak (D)" = '38%';