Feedback: As in your explanation, the SQL query returns an empty table,
because the "WHERE" clause contains mutually exclusive conditions. The
question returns 1 column, the customer names who have order status of both
"On Road" and "Shipped". So the question returns 1 column. So the SQL
prediction above is wrong. Please fix the SQL.

SQL: SELECT customers.customer_name FROM customers JOIN orders ON customers.
customer_id = orders.customer_id WHERE orders.order_status = "On Road"
INTERSECT SELECT customers.customer_name FROM customers JOIN orders ON
customers.customer_id = orders.customer_id WHERE orders.order_status = "
Shipped"
Teaching Large Language Models to Self-Debug