Complex sentence: In 1992, the government of the Netherlands officially legalised commercial TV, and many new commercial channels have become established since then with the result of market share for public television falling from 85% to 50% by 1994.
Split into simpler sentences: In 1992, the government of the Netherlands legalised commercial television, and a number of new commercial channels were established. As a result the market share for public television fell from 85% to 50% by 1994.