user: Question: When nº is 3, what are all the coaliton parties?
Columns: ['Nº', 'Cabinet (Nickname)', 'Took office', 'Left office', 'Duration', 'Coalition parties', 'ministers', 'ministries', 'King']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'Jón Magnússon I', '4 January 1917', '25 February 1920', '3 years, 1 month, 21 days (1,147 days)', 'HRP — IP þversum — PP', 'N/A', 0.0, 'Christian X']
SQL:

assistant: SELECT "Coalition parties" FROM "Table" WHERE "Nº" = 3.0;