text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE customer (acc_type VARCHAR, acc_bal INTEGER, credit_score INTEGER)
  ### Question:
  For each account type, find the average account balance of customers with credit score lower than 50.
  ### Answer:
  SELECT AVG(acc_bal), acc_type FROM customer WHERE credit_score < 50 GROUP BY acc_type