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.

The Competition and Markets Authority’s analysis that the Big Six suppliers have charged households £50 a year too much for their energy is “not credible”, British Gas owner Centrica has claimed.

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