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_84 (play_off VARCHAR, events VARCHAR, season VARCHAR)

### Question ###
Which Play-Off has Events of –, and a Season of a-6?

### Accurate SQL ###

SELECT play_off FROM table_name_84 WHERE events = "–" AND season = "a-6"