united_states | ethnicgroup | african_americans <tsp> united_states | language | english_language <tsp> united_states | leadertitle | president_of_the_united_states <tsp> 250_delaware_avenue | location | united_states <tsp> united_states | leadername | barack_obama <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 united states is led by a president who was barack obama. the language spoken is english and one of the ethnic groups are the african americans. the us is the location of 250 delaware avenue.the united states is the world's third-largest country by both land and total area