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.
Text: New York, Usa - — The Chairperson of the African Union Commission (AUC) Dr. Nkosazana Dlamini Zuma and the Executive Secretary of the United Nations Economic Commission for Africa (UNECA) Dr. Carlos Lopes will officially welcome the new President of the African Development Bank (AfDB), Dr. Adesina Akinwumi, to Addis Ababa, Ethiopia, headquarters of both the AUC and the UNECA.
user
employer: Carlos Lopes, African Union; employer: Carlos Lopes, United Nations
assistant