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_74 ( touchdowns INTEGER, points VARCHAR, position VARCHAR, player VARCHAR )

### Question ###
What is the lowest number of touchdowns for left halfback WIllie Heston who has more than 15 points?

### Accurate SQL ###

SELECT MIN(touchdowns) FROM table_name_74 WHERE position = "left halfback" AND player = "willie heston" AND points > 15