It doesn't contain any punctuation, first of all, and second, it doesn't have a subject. To be a sentence, it must contain a subject. It also must contain one main clause.
-DustinBR
Can you comment the article because there's no image on a article. Hope this helped, you probably didn't notice.
Explanation:
They don't write stories.
He was singing a song.
If you are able to tell me what you want the answer to, I'm sure I can help you.