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_15 ( points INTEGER, year VARCHAR, chassis VARCHAR )

### Question ###
What are the lowest number of points with a Year of 1978, and a Chassis of ensign n177?

### Accurate SQL ###

SELECT MIN(points) FROM table_name_15 WHERE year = 1978 AND chassis = "ensign n177"