Complex sentence: The revenue blocks exist to simplify local administration, and each consist of a small number of revenue villages, governed by Revenue Inspector, who undertake key administrative roles, most notably the identification and collection of tax revenue.
Split into simpler sentences: The revenue blocks exist to simplify local administration, and each consists of a small number of revenue villages, governed by a Revenue Inspector. The Revenue Inspector is charged with a number of key administrative roles, most notably the identification and collection of tax revenue.