united_states | ethnicgroup | african_americans <tsp> united_states | leadername | barack_obama <tsp> a_wizard_of_mars | language | english_language <tsp> a_wizard_of_mars | country | united_states <sep> the united states of america (usa or usa), commonly known as the united states (us or us) or america, is a country primarily located in north america it consists of 50 states, a federal district, five major unincorporated territories, nine minor outlying islands, and 326 indian reservations the united states is the world's third-largest country by both land and total area 
barack obama is the president of the us. where a wizard of mars originates from and is published in english and there's an ethnic group called african americans.the united states is the world's third-largest country by both land and total area