What is the relationship between Manitoba Hydro 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.

The business of hydro: Premier Greg Selinger and Manitoba Hydro interim president Darren Rainkie announced today that SaskPower will buy a minimum of 100 megawatts of electricity from Manitoba beginning in 2020.

Answer: product_or_material_produced