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_31235 ( "Round" text, "Clubs remaining" real, "Clubs involved" real, "Winners from previous round" real, "New entries this round" text, "Leagues entering at this round" text )

### Question ###
How many clubs remained when there were 4 winners from the previous round?

### Accurate SQL ###

SELECT "Clubs remaining" FROM table_31235 WHERE "Winners from previous round" = '4'