Complex sentence: For a time, in the house was rented out by the city to vacationers, but by 1969, the house was in such poor condition that it was dismantled and rebuilt by the Pittsburgh History and Landmarks Foundation.
Split into simpler sentences: For a time, in the house was rented out by the city to vacationers. However, by 1969, the house was in such poor condition that it was dismantled and rebuilt by the Pittsburgh History and Landmarks Foundation.