Simplify the following text for a Grade 7 native English-speaking person.
Original: Yonezawa had been in debt for roughly a hundred years when Harunori took over ; Shigesada even considered returning the domain to the shogunate as a last resort .
Simplified: Yonezawa had been in debt for about a hundred years when Uesugi took over . Shigesada had thought about returning the domain to the shogunate because of the debt .