What is the relationship between Linn Energy and Petroleum 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.

** Biggest gainers include: Basic Energy Services Inc (NYSE: BAS - news ) up 16 pct at $3.99, Midstates Petroleum Company Inc (NYSE: MPO - news ) up 20 pct at $2.16, Whiting Petroleum Corp (NYSE: WLL - news ) up 14.5 pct at $2.53, Seventy Seven Energy Inc (NYSE: SSE - news ) up 15.2 pct at $2.54, Linn Energy LLC up 19 pct at $2.52

Answer: product_or_material_produced