Complex sentence: The ability to sustain a lucrative business in bootlegging liquor was largely helped by the minimal police surveillance at the time; there were only 134 agents designated by the Prohibition Unit to cover all of Illinois, Iowa and parts of Wisconsin.
Split into simpler sentences: The ability to sustain a lucrative business in bootlegging liquor was largely helped by the minimal police surveillance at the time. There were only 134 agents designated by the Prohibition Unit to cover all of Illinois, Iowa, and parts of Wisconsin.