Complex sentence: The landlord/lady is responsible for maintaining the exterior of the property and insuring the building and the tenant is responsible for the interior of the property, paying the rent, which is well below the market rent and set by the Rent Office.
Split into simpler sentences: The landlord/lady is responsible for maintaining the exterior of the property and insurance for the property. The tenant is responsible for the interior of the property and paying the rent, which is well below the market rent and is set by the Rent Office.