The URL you provided points to a JPG image file, not an HTML article page, so there is no article text to extract or reproduce in markdown.
Images (like ...Oswiecim-11.jpg) do not contain embedded readable article text in the way web pages or PDFs do; they only store pixel data. To extract any text, one would need to run OCR (optical character recognition) on the image, which goes beyond “pure markdown containing the article Title as H1 and the core article text” as requested.
If you want, you can upload the image directly here, and I can then:
Wybierz formę na pasku. Stanosky otwiera się z boku, pokazuje cenę i robi z tego TWÓJ materiał — tekst, mem, rolkę albo kawałek.