Html elements samp, iframe, and sub

samp element Specifies that the enclosed text is sample text and should be rendered in the browser appropriately, iframe element Defines an inline frame (ie a frame embedded in a document), sub element Specifies that the enclosed text should be rendered in the browser as subscript. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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samp samp and iframe, samp, iframe, and sub

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