Simplify the following text for a Grade 10 native English-speaking person.
Original: The name Bredevoort appears for the first time in 1188 , when the earl of Steinfurt tried to sell his share of the castle to the bishop of MÃ 1\/4 nster and the earl of Lohn tried to sell his share to the earl of Gelderland , a war broke out between the bishop and the earl of Gelderland .
Simplified: The name Bredevoort appears for the first time on a list of properties belonging to the archbishop of Cologne in 1188 , who owned shares of the castle Bredevoort . When the count of Steinfurt tried to sell his share of the castle to the bishop of Munster and the count of Loon tried to sell his share to the count of Gelderland , a conflict broke out between the bishop and the count of Gelderland .