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_37 ( best_5_year_period VARCHAR, best_15_year_period VARCHAR )

### Question ###
Which best 5-year period has a best 15-year period of alekhine; lasker?

### Accurate SQL ###

SELECT best_5_year_period FROM table_name_37 WHERE best_15_year_period = "alekhine; lasker"