Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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)?

### Accurate SQL ###

SELECT event FROM table_name_16 WHERE method = "submission (rear naked choke)" AND opponent = "karl knothe"