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.

Hosted by Masdar and part of Abu Dhabi Sustainability Week, WFES 2016 will be held at the Abu Dhabi National Exhibition Centre on 18 21 January 2016.

Answer: headquarters_location: Masdar, Abu Dhabi