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_70 ( year VARCHAR, engine VARCHAR, chassis VARCHAR )

### Question ###
In what year did a car have a yamaha v12 engine and a brabham bt60y chassis

### Accurate SQL ###

SELECT year FROM table_name_70 WHERE engine = "yamaha v12" AND chassis = "brabham bt60y"