Complex sentence: In 2015, she had a net worth of $8.4 billion, is a Swiss citizen living in Zurich and has three children/sons (Éric born in 1992, and twins, Maurice and Kirill, born in 1998) according to "Forbes".
Split into simpler sentences: In 2015, she had a net worth of $8.4 billion. She is a Swiss citizen living in Zurich and has three children/sons (Éric born in 1992, and twins, Maurice and Kirill, born in 1998) according to "Forbes".