What is the relationship between Duke Energy and electricity in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

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.

Answer: product_or_material_produced