<prompt> List five cities with a population over 1 million.  <response>: 1. Tokyo, Japan - with a population of over 37 million.2. Delhi, India - with a population of over 30 million.3. Shanghai, China - with a population of over 27 million.4. São Paulo, Brazil - with a population of over 21 million.5. Mumbai, India - with a population of over 20 million. 