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_40967 ( "Average population (x 1000)" real, "Live births" real, "Deaths" real, "Natural change" real, "Crude birth rate (per 1000)" real, "Crude death rate (per 1000)" real, "Natural change (per 1000)" real )

### Question ###
What is the lowest Natural Change, when Natural Change (Per 1000) is 19.1, and when Crude Birth Rate (Per 1000) is less than 28.3?

### Accurate SQL ###

SELECT MIN("Natural change") FROM table_40967 WHERE "Natural change (per 1000)" = '19.1' AND "Crude birth rate (per 1000)" < '28.3'