Cann points to some material combinations already formed or in the works, on all sides of the industry: Shell-BG Group on the supply side, Baker Hughes-Halliburton in services, and on the purchasing side, the powerful Jera combination between Tokyo Electric Power Co and Chubu Electric Power Co.
Utilize the input text as a context reference, choose the right relationship between 'Jera' and 'Tokyo' from the options.
Options: position held, business division, platform, headquarters location