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: At an interaction hosted by Doha Bank Group CEO R Seetharaman and his team where Qatar Airways Group CEO Akbar Al Baker was the Guest of Honour, Ambani also met with a number of top Qatari businessmen and investors.
user
chief_executive_officer: Qatar Airways, Akbar Al Baker; location_of_formation: Qatar Airways, Doha; headquarters_location: Qatar Airways, Doha
assistant