The pdf is a research article, and the assignment is to read it (and additional material if needed) and write a press release on it. A press release is a summary of the research that was conducted, highlighting the outcomes and their broader impact on knowledge advancement, possibly even their contribution to a general public interest in this particular research topic. If you choose this assignment, I expect about 2 text pages and you may include (reproduce) one figure from the article in your press release to better bring across your main statements. Basic tipp: identify a hook in the article, which will form the main focus of your story. Press releases, e.g. on websites of research institutions, like to show the breakthrough results, as well as present a human angle to ensure the story has a public interest as well.
Here is the article:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3440082/