user: Question: What is thea year the road closed April 13?
Columns: ['Year', 'Road Opened', 'Road Closed', 'Freight Carried s Tonne', 'Super B Capacity Reached [ citation needed ]', 'Number of Truck Loads North']
Types: ['real', 'text', 'text', 'real', 'text', 'real']
Sample row: [2000.0, 'January 29', 'April 3', 111090.0, 'n/a', 3703.0]
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Road Closed" = 'April 13';