Youtube activity of "Denis Khafizov" (@deniskhafizov6827) on "TED-Ed" channel.
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UC4UwLedNg3I3WmL3Dl4Ftbw
Commenter youtube id
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Denis Khafizov
Commenter name
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@deniskhafizov6827
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"The real reason polio is so dangerous"
Comments by video