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_96 (semi_final_dual_television_commentator VARCHAR, grand_final_television_commentator VARCHAR, spokesperson VARCHAR)
### Question:
What is the semi-final dual television commentator status of the year with Pierre Tchernia as the grand final television commentator and an unknown spokesperson?
### Answer:
SELECT semi_final_dual_television_commentator FROM table_name_96 WHERE grand_final_television_commentator = "pierre tchernia" AND spokesperson = "unknown"