graduation ceremony inside a building

graduation ceremony inside a building. At a long table covered with a white tablecloth, a group of people are seated and facing forward. In front of them are water bottles and papers. A person in academic regalia is standing up and speaking, while another person in a construction helmet and reflective vest is seen in the right foreground. There are empty chairs in the foreground, and a banner behind the seated group reads "The Nigerian Society of Engineers, Welcome you to the Graduate Membership 3rd Induction". The building has a metal roof and support columns. The floor is concrete.