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.

Phillips 66 was up 2.6 percent after Warren Buffett's Berkshire Hathaway disclosed a $4.48 billion stake in the oil refiner.

Answer: owner_of: Berkshire Hathaway, Phillips 66; owned_by: Phillips 66, Berkshire Hathaway