united_states | capital | washington,_dc <tsp> amarillo,_texas | country | united_states <tsp> united_states | ethnicgroup | african_americans <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 
the capital of the u.s.a. is washington d.c. where one finds african americans among ethnic groups and the city of amarillo in the state of texas.the united states is the world's third-largest country by both land and total area