Textual material that names the parties who the author wishes to thank or recognize for their assistance in, for example, producing the work, funding the work, inspiring the work, or assisting in the research on which the work is based.
The following, in order:
<label> Label (of an Equation, Figure, Reference, etc.), zero or one
<abstract> Abstract, zero or more
<kwd-group> Keyword Group, zero or more
<ref-list> Reference List (Bibliographic), zero or more