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 ( rank INTEGER, period VARCHAR, games VARCHAR )

### Question ###
What is the rank for the period of 1973 89, with less than 423 games.

### Accurate SQL ###

SELECT SUM(rank) FROM table_name_7 WHERE period = "1973–89" AND games < 423