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_45472 ( "City proper" text, "Population City limits in millions" real, "Density per km\u00b2" real, "Urban area" text, "Population Urban area in millions" real, "Metro area" text, "Population Metro area in millions" text )

### Question ###
Which urban area has a population of 5.3 million?

### Accurate SQL ###

SELECT "Urban area" FROM table_45472 WHERE "Population Urban area in millions" = '5.3'