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 problem_log (problem_log_id VARCHAR, problem_id VARCHAR, log_entry_date VARCHAR)
### Question:
What is the oldest log id and its corresponding problem id?
### Answer:
SELECT problem_log_id, problem_id FROM problem_log ORDER BY log_entry_date LIMIT 1