Complex sentence: A natural monopoly is a monopoly in an industry in which barriers to entry relative to the size of the market give the largest supplier in an industry, often the first supplier in a market, an overwhelming advantage over potential competitors.
Split into simpler sentences: A natural monopoly is a monopoly in an industry in which barriers to entry relative to the size of the market. This gives the largest supplier in an industry, often the first supplier in a market, an overwhelming advantage over potential competitors.