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_28 ( extra VARCHAR, result VARCHAR, tournament VARCHAR )

### Question ###
What is the extra when the result is 4th at the NCAA Championships?

### Accurate SQL ###

SELECT extra FROM table_name_28 WHERE result = "4th" AND tournament = "ncaa championships"