Simplify the following text for a Grade 10 native English-speaking person.
Original: She was born in Novi Sad , Serbia ( then Yugoslavia ) to ethnic Hungarian parents but became a naturalized United States citizen in 1994 .
Simplified: She was born in Novi Sad , Serbia , former Yugoslavia to Hungarian parents . She became a naturalized United States citizen in 1994 and also received Hungarian citizenship in June 2007 .