Complex sentence: It is the oldest building on Wilshire Boulevard and was listed in the National Register of Historic Places in 1972, but has fallen into a state of disrepair due to the lack of funds within the Veterans Administration to pay for the required repairs and renovation.
Split into simpler sentences: It is the oldest building on Wilshire Boulevard and was listed in the National Register of Historic Places in 1972. The structure has fallen into a state of disrepair due to the lack of funds within the Veterans Administration to pay for the required repairs and renovation.