On what day was the order with invoice number 10 placed?
SELECT T1.date_order_placed FROM orders AS T1 JOIN shipments AS T2 ON T1.order_id = T2.order_id WHERE T2.invoice_number = 10
SELECT T1.date_order_placed FROM orders AS T1 JOIN shipments AS T2 ON T1.order_id = T2.order_id WHERE T2.invoice_number = 10
[{'date_order_placed': '1983-09-08 12:32:49'}, {'date_order_placed': '1997-01-27 19:12:01'}, {'date_order_placed': '1982-12-29 21:10:11'}]