Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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