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_56 (comments VARCHAR, length_over_all VARCHAR)

### Question ###
Which Comments has a Length Over All of 4.5m?

### Accurate SQL ###

SELECT comments FROM table_name_56 WHERE length_over_all = "4.5m"