Simplify the following text for a Grade 7 native English-speaking person.
Original: Notable individuals who have otherwise lived in the United States are also sub-categorised , however , under : Category : Immigrants to the United States , : Category : Expatriates in the United States or : Category : Ambassadors to the United States .
Simplified: For more people from the United States , please see : Category : American people by state . For people of the United States by their background , see : Category : Ethnic groups in the United States .