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Audience listens to the speech of the lecturer in the conference hall
Young woman qualified lecturer speaks to small audience of listeners and talks about trends in contemporary art. Professor-student interaction, productive learning
Speaker giving a talk on corporate business conference. Unrecognizable people in audience at conference hall. Business and Entrepreneurship event.
Female speaker giving presentation in lecture hall at university workshop. Audience in conference hall. Rear view of unrecognized participant in audience. Scientific conference event.

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