How many more people, in terms of percentage of the population of Nigeria, are expected to live in urban areas in 2050 compared to 2010?
return Nigeria ;return population of   #1 ;return #2 that is expected to live in   urban areas ;return #3 in   2050 ;return #3 in   2010 ;return percentage of   #4 ;return percentage of   #5 ;return the  difference of   #6 and  #7
['select', 'project', 'filter', 'filter', 'filter', 'project', 'project', 'arithmetic']