Html elements sub, abbr, and hgroup

sub element Specifies that the enclosed text should be rendered in the browser as subscript, abbr element Specifies that a string is an abbreviation for a longer word or phrase, hgroup element The HTML Headings Group Element (<hgroup>) represents the heading of a section. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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sub sub and abbr, sub, abbr, and hgroup

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