user: Question: Who wrote Episode 2-15 (56)?
Columns: ['Episode', 'Title', 'Writer(s)', 'Preservation', 'Original airdate']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2-01 (42)', '"Traffic in Death"', '—', 'Preserved', 'September25,1938']
SQL:

assistant: SELECT "Writer(s)" FROM "Table" WHERE "Episode" = '2-15 (56)';