Atlantic Coast Pipeline, formed by Dominion ( D ), Duke Energy ( DUK ), Piedmont Natural Gas ( PNY ) and AGL Resources ( GAS ), formally applied to the Federal Energy Regulatory Commission for permission to build a 564-mile interstate natural gas transmission pipeline designed to meet the need for cleaner electricity generation, satisfy the growing demand for natural gas to heat homes and businesses, and promote consumer savings and economic growth.
What is the relationship between 'Duke Energy' and 'electricity' in the context of the input sentence.
Options: chief executive officer, distribution format, brand, product/material produced