Given phrases that describe the relationship between two words/phrases as options, extract the word/phrase pair and the corresponding lexical relationship between them from the input text. The output format should be "relation1: word1, word2; relation2: word3, word4". Options: 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.

Peter Atherton, analyst at Jefferies investment bank, said that the cost to take control of just the UK assets of companies, which include British Gas owner Centrica and network operator National Grid, would drain about £124bn from the nation's coffers.

Answer: owner_of: Centrica, British Gas; owned_by: British Gas, Centrica