African American architect walking to whiteboard as audience applauding him and then giving speech during business conference
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Leading healthcare expert standing in front on projection screen with line graph, using digital tablet and giving speech to audience during medical conference
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Close up foreground focus shot of unrecognizable man standing in front of audience in conference hall and gesticulating while giving speech
International political leaders giving speech to audience during summit press conference
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Young female politician standing at lectern with microphone and giving speech in front of public and journalists during press conference
Biracial student giving speech in front of peers and professor during class
Senior male general with gray hair standing by microphone and giving speech to audience while holding military committee conference
Arc shot of senior grey haired business coach standing in front of mixed-age multiethnic audience and giving a speech during educational seminar
Biracial male student standing at lectern, reading notes and giving speech during math class at university
Senior female politician standing by rostrum with mic and giving speech during press conference of military committee
Asian female speaker walking to whiteboard as people applauding her and giving presentation during architecture conference