Simplify the following text for a Grade 7 native English-speaking person.
Original: She emigrated from the UK to the US and created her own network television series , The Tracey Ullman Show , from 1987 until 1990 , from which The Simpsons was spun off in 1989 .
Simplified: She emigrated to the U.S. and ended up having her own network television series , The Tracey Ullman Show , from which The Simpsons was spun off in 1989 .