Question: Genie Energy and which other oil and gas company, considered one of the seven 'Supermajor' oil companies, owns American Shale Oil, the developers of in-situ shale oil extraction technology in Rifle, Colorado?
Sentence (from "Spent shale"): Depending on the extraction process and the amount of remaining organic matter, spent shale may be classified as oil shale coke, semi-coke or coke-ash residue, known also as oil shale ash.
Relevant evidence: No