people sitting in lecture, diverse group, adults listening, indoor educational session, attentive audience, classroom setting, educational event, group of people, learning environment, audience in lecture, educational gathering

people sitting in lecture, diverse group, adults listening, indoor educational session, attentive audience, classroom setting, educational event, group of people, learning environment, audience in lecture, educational gathering
people sitting in lecture, diverse group, adults listening, indoor educational session, attentive audience, classroom setting, educational event, group of people, learning environment, audience in lecture, educational gathering
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