To HTML Content Category Phrasing

Html elements label, iframe, and em

label element Defines a label on a form, iframe element Defines an inline frame (ie a frame embedded in a document), em element Specifies that the enclosed text should be emphasized. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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label label and iframe, label, iframe, and em

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HTML element example

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