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_1140113_5 (constructor VARCHAR, race_name VARCHAR)

### Question ###
How many constructors won the III Redex Trophy?

### Accurate SQL ###

SELECT COUNT(constructor) FROM table_1140113_5 WHERE race_name = "III RedeX Trophy"