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.
Text: Kevin Leung, Country Commercial Manager at British Airways said, 'We are pleased that Airtel Premier customers now have the advantage of travelling between Accra and London and over 150 destinations at specially discounted rates.
user
location_of_formation: British Airways, London; headquarters_location: British Airways, London
assistant