What is the relationship between Aerojet and rocket engine 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.

NATIONAL HARBOR, Md., Sept 15 Aerojet Rocketdyne Holdings Inc on Tuesday said it expected to complete its new AR-1 rocket engine by 2019 to replace a soon-to-be banned Russian engine, but the date could slip if it does not receive enough U.S. government funding.

Answer: product_or_material_produced