Complex sentence: However Karacs had been invited to run the school by the Calvinist church in Miskolc and she became the head of the Zrínyi Ilona Grammar School for girls until 1859.
Split into simpler sentences: However Karacs had been invited to run the school by the Calvinist church in Miskolc. She was the head of the Zrínyi Ilona Grammar School until 1859.