attention
audience
auditorium
background
briefing
business
businessman
businesswoman
caucasian
center
communication
conference
congress
corporate
discussion
education
equipment
event
female
group
hall
indoor
interior
international
learn
learning
lecture
lecturer
manager
meeting
microphone
modern
new
people
person
presentation
professional
public
room
seat
seminar
speaker
speech
spokesman
spokeswoman
stage
training
woman
work
young