user: Question: Which urban area has a population of 5.3 million?
Columns: ['City proper', 'Population City limits in millions', 'Density per km²', 'Urban area', 'Population Urban area in millions', 'Metro area', 'Population Metro area in millions']
Types: ['text', 'real', 'real', 'text', 'real', 'text', 'text']
Sample row: ['London, UK', 7.5, 4761.0, 'Paris, France', 10.1, 'London, UK', '12–14']
SQL:

assistant: SELECT "Urban area" FROM "Table" WHERE "Population Urban area in millions" = 5.3;