@hep.over('<STR_LIT>', '<STR_LIT>')<EOL>@utils.for_each_value<EOL>def copyright(self, key, value):
MATERIAL_MAP = {<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>}<EOL>material = value.get('<STR_LIT:e>') or value.get('<STR_LIT:3>')<EOL>return {<EOL>'<STR_LIT>': value.get('<STR_LIT:d>'),<EOL>'<STR_LIT>': MATERIAL_MAP.get(material),<EOL>'<STR_LIT>': value.get('<STR_LIT:f>'),<EOL>'<STR_LIT:url>': value.get('<STR_LIT:u>'),<EOL>'<STR_LIT>': maybe_int(value.get('<STR_LIT:g>')),<EOL>}<EOL>
Populate the ``copyright`` key.