Complex sentence: Isberg worked as a caretaker at Bergen tukthus, and was assigned executioner for the city of Bergen in 1836, and for Bergen stift and Stavanger amt from 1838.
Split into simpler sentences: Isberg worked as a caretaker at Bergen tukthus. He was assigned executioner for the city of Bergen in 1836, and for Bergen stift and Stavanger amt from 1838.