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_46 ( wins INTEGER, rank VARCHAR, first_win VARCHAR )

### Question ###
What is the rank 6 lowest win who's first win was at the 1950 British Grand Prix?

### Accurate SQL ###

SELECT MIN(wins) FROM table_name_46 WHERE rank > 6 AND first_win = "1950 british grand prix"