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_30341 ( "Team" text, "Outgoing manager" text, "Manner of departure" text, "Date of vacancy" text, "Incoming manager" text, "Date of appointment" text )

### Question ###
how many new managers replaced manager(s) who resigned?

### Accurate SQL ###

SELECT COUNT("Incoming manager") FROM table_30341 WHERE "Manner of departure" = 'Resigned'