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_16 (event VARCHAR, method VARCHAR, opponent VARCHAR)
### Question:
What event was the opponent Karl Knothe and had a submission (rear naked choke)?
### Answer:
SELECT event FROM table_name_16 WHERE method = "submission (rear naked choke)" AND opponent = "karl knothe"