Youtube activity of "Яков Цветков" (@ЯковЦветков-я4г) on "CNN" channel.
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UCeXSbKr-yFN3G4L4P71Wr6A
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Яков Цветков
Commenter name
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@ЯковЦветков-я4г
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"Human echolocation lets blind man 'see'"
Comments by video