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 table_name_68 (a_dyck VARCHAR, j_thiessen VARCHAR)
### Question:
Which of the A. Dyck has J. Thiessen of Du?
### Answer:
SELECT a_dyck FROM table_name_68 WHERE j_thiessen = "du"