Youtube activity of "Mark Welch" (@markwelch3564) on "TED-Ed" channel.
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UC4vOmMkmU7zK4OZd-_yvd0w
Commenter youtube id
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Mark Welch
Commenter name
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@markwelch3564
Commenter name id
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"Парадокс Бесконечного отеля — Джефф Декофски"
Comments by video