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_30984 ( "Club" text, "Outgoing Head Coach" text, "Date of vacancy" text, "Manner of departure" text, "Incoming Head Coach" text, "Date of appointment" text )

### Question ###
Who are the outgoing head coaches whose manner of departure is Gardening Leave 1?

### Accurate SQL ###

SELECT "Outgoing Head Coach" FROM table_30984 WHERE "Manner of departure" = 'Gardening leave 1'