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_75 (parts_per_example VARCHAR, value_of_quantity VARCHAR)

### Question ###
What is the Parts-per example of 2×10 −6?

### Accurate SQL ###

SELECT parts_per_example FROM table_name_75 WHERE value_of_quantity = "2×10 −6"