Complex sentence: There is no exact date to the scroll, but it is estimated to being sometime between 1120 and 1140, in which case it was created just a little over a century after Lady Murasaki Shikibu wrote "The Tale of Genji".
Split into simpler sentences: There is no exact date to the scroll, but it is estimated to being sometime between 1120 and 1140. It was constructed just a little over one hundred years after Lady Murasaki Shikibu wrote "The Tale of Genji".