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_22645714_5 ( tournament_venue__city_ VARCHAR, conference VARCHAR )

### Question ###
How many locations are listed for the Big 12 Conference?

### Accurate SQL ###

SELECT COUNT(tournament_venue__city_) FROM table_22645714_5 WHERE conference = "Big 12 conference"