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_44477 ( "Round" real, "Pick" real, "Overall" real, "Name" text, "Position" text, "College" text )

### Question ###
What is the total number of Pick, when Position is OT, when Overall is greater than 91, when Round is greater than 21, and when College is Mississippi?

### Accurate SQL ###

SELECT COUNT("Pick") FROM table_44477 WHERE "Position" = 'ot' AND "Overall" > '91' AND "Round" > '21' AND "College" = 'mississippi'