## first regex steps
^(\s+- )givenName: (.+)\n(\s+)familyName: (.+)
$1givenName: $2\n$3familyName: $4\n###_tmpAuthor_: $2 $4

^(datePublished: )(.+)
$1$2\n###_tmpDate_: $2

## apply bash script "add-metadata-author-and-date.sh" with modifications by awk

## second regex steps
^(date: )###_tmpDate_: (.+)
$1$2

^###_tmpAuthor_: (.+)
  - $1