name = 'people_in_capitals/1' slug = 'number of people living in capitals' description = '''\
people_in_capitals(N)
: N
is the total number of people living in capital cities of the world.
Useful predicates:
country(Name, ID, Capital, CapitalProvince, Size, Population)
city(Name, Country ID, Province, Population, Lat, Lon, Elevation)
.