user: Question: Which Description has a Year of Issue of 1983, and a Thickness of 1.7mm, and a Weight of 3.50grams?
Columns: ['Year of Issue', 'Description', 'Weight', 'Diameter', 'Thickness', 'Edge']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1976.0, 'Round Nickel Token, Three Maple Leaves with Beads', '4.30grams', '21.9mm', '1.71mm', 'Plain']
SQL:

assistant: SELECT "Description" FROM "Table" WHERE "Year of Issue" = 1983.0 AND "Thickness" = '1.7mm' AND "Weight" = '3.50grams';