Appen Bismarck Screening Quiz

I'm taking the Bismarck screening quiz, but I am quite confused. The work scope is on assessing if the summary is adequate or not, but I'm having trouble with gauging if the summary is good or not. There is no example sentence and it just goes straight to the test. There is a criteria though as to what would be considered as good, ok, bad, & very bad. Nevertheless, I'm still having trouble with the test. It's subjective for me when it comes to what is good and okay. Without any concrete example to base on, I've hit a slump. Any tips on how to do this or any sites on how to improve myself? Thank you!