abstract
adult
audience
background
blur
blurred
boardroom
business
businessman
center
coaching
communication
conference
congress
convention
cooperation
corporate
design
education
event
explaining
forum
gesturing
group
hall
indoors
international
learn
lecture
light
meeting
microphone
modern
participants
people
person
podium
presentation
public
room
seminar
speaker
speaking
speech
study
studying
teacher
teaching
training
university
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