Simplify the following text for a Grade 8 native English-speaking person.
Original: After studying at Japan Women 's University and working in the office of Toyo Ito , in 1987 she founded Kazuyo Sejima and Associates .
Simplified: Sejima studied at Japan Women 's University and worked in the office of Toyo Ito . Then , she started her own company , Kazuyo Sejima and Associates in 1987 .