instruction: A line chart for what are the number of the payment dates for any payments that have an amount greater than 10 or were handled by a staff member with the first name Elsa?
response: SELECT payment_date, COUNT(payment_date) FROM payment WHERE amount > 10 UNION SELECT T1.payment_date FROM payment AS T1 JOIN staff AS T2 ON T1.staff_id = T2.staff_id WHERE T2.first_name = 'Elsa' GROUP BY payment_date