Get the subject name of a newsletter field into an article

I am working with contao newsletter. Is there a way to get the subject field value of newsletter into an article which is text content element.
Suppose my newsletter subject field name is "XXXXX". And I want to get this name into my article which is text content element. Is there any way?

Untested:

Use this insert tag (id must be the ID of the newsletter):
{{file::nlSubject.html5?id=42}}

templates/nlSubject.html5

PHP Code:

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<?= \NewsletterModel::findByPk(\Input::get('id'))->subject; ?>

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