como puedo hacer este anuncio para flex y bison?:
IDENTIFICATION-DIVISION-CONTENT::=(['AUTHOR'['.']{COMMENT-ENTRY}*]|['INSTALLATION'['.']{COMMENT-ENTRY}*]|['DATE-WRITTEN'['.']{COMMENT-ENTRY}*]|['SECURITY'['.']{COMMENT-ENTRY}*]
IDENTIFICATION-DIVISION-CONTENT::=(['AUTHOR'['.']{COMMENT-ENTRY}*]|['INSTALLATION'['.']{COMMENT-ENTRY}*]|['DATE-WRITTEN'['.']{COMMENT-ENTRY}*]|['SECURITY'['.']{COMMENT-ENTRY}*]