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_18893428_1 (constructor VARCHAR, driver VARCHAR)

### Question ###
Who is the constructor for the car driven by George Heath?

### Accurate SQL ###

SELECT constructor FROM table_18893428_1 WHERE driver = "George Heath"