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_2581397_3 (race VARCHAR, weight__kg_ VARCHAR)

### Question ###
List the weight for 56.5 kilograms.

### Accurate SQL ###

SELECT race FROM table_2581397_3 WHERE weight__kg_ = "56.5"