user: Question: which round has a margin of 178?
Columns: ['Rank', 'Margin', 'Club', 'Opponent', 'Year', 'Round', 'Venue']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1', '190', 'Fitzroy', 'Melbourne', '1979', '17', 'VFL Park']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Margin" = '178';