user: ### NOW ANSWER:
Question: Which chromosomes have an Unknown property?
Columns: ['Name', 'Family name', 'Receptor', 'Coreceptor', 'Property', 'Chromosomal location']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['IL-1α', 'IL-1F1', 'IL-1RI', 'IL-1RacP', 'Proinflammatory', '2q14']
SQL:

assistant: SELECT "Name" FROM "Table" WHERE "Property" = 'Unknown';