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_7 ( tie_no VARCHAR, home_team VARCHAR )

### Question ###
What was the tie number of the game when the queens park rangers were the home team?

### Accurate SQL ###

SELECT tie_no FROM table_name_7 WHERE home_team = "queens park rangers"