Original sentence: By 1951 the White House had become physically unstable and the house was temporarily abandoned while a major reconstruction took place.The building's interior was dismantled and stored, the interior completely gutted and a new steel superstructure built within the exterior walls
Edited sentence: By 1948 the White House had become physically unstable, and the house was temporarily abandoned while a major reconstruction took place.The building's interior was dismantled, the furnishings and decorative items were stored, and a new steel superstructure was built within the exterior walls