Complex sentence: The takedown of the DMA information by ACNielsen was a shock to be sure; it provided a simple way to categorize the nation's television markets from largest to smallest, and when we lost that, we had to scramble.
Split into simpler sentences: The takedown of the DMA information by ACNielsen was a shock to be sure. The information that was the subject of the takedown order provided a simple way to categorize the nation's television markets from largest to smallest, and when we lost that, we had to scramble.