This is not subtitle
"Few publications actually use subtitles. Somewhat more common are short summary sentences that are also shown below the title (and are called standfirst by the British). These summary sentences are usually short and are not part of the article's text. It is advisable but not required to represent them as subtitle elements."
this part is a summary for the article and it has a @class: "post-summary" and what I did is based on the checklist. you can check the checklist to be sure.
a duplicate issue that has been declined already:
- Declined by admin
- Type of issue
- Author added their own content
- Mar 18, 2019