Simplify the following text for a Grade 10 native English-speaking person.
Original: Anastasia Valeryevna `` Nastia '' Lyukina ( ; born October 30 , 1989 ) is a Russian-American artistic gymnast .
Simplified: Anastasia `` Nastia '' Valeryevna Liukin , born October 30 , 1989 , is a American artistic gymnast .