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_53 ( week INTEGER, time__cst_ VARCHAR, game_site VARCHAR )

### Question ###
What is the lowest week that has 7:15 p.m. as the time (cst) and fedexfield as the game site?

### Accurate SQL ###

SELECT MIN(week) FROM table_name_53 WHERE time__cst_ = "7:15 p.m." AND game_site = "fedexfield"