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.

Affordable housing, the growing demand for quality facility management and the need to improve broker knowledge of Dubai regulations are the three themes scheduled for discussions at the new one-day conference, taking place on 7 September at the Conrad Hotel, Dubai, ahead of the leading exhibition which runs from 8-10 September at the Dubai World Trade Centre.

Answer: location_of_formation: Dubai World, Dubai; headquarters_location: Dubai World, Dubai