<page_title> Megacity </page_title> <section_title> Largest cities </section_title> <table> <cell> Lagos <col_header> Megacity </col_header> </cell> <cell> Nigeria <col_header> Country </col_header> </cell> <cell> Africa <col_header> Continent </col_header> </cell> <cell> 21,000,000 <col_header> Population </col_header> </cell> </table>
The Megacity Lagos, Nigeria, Africa had an estimation of 21 million.