Persisting Problem "An Introduction to Text Summarization using the TextRank Algorithm (with Python implementation)"

I am following the guide on and produced the same code as seen on the website on Jupter Notebook. I was able to replicate the data, however it is not the same as the authors. The summary sentences are either not in order or are different.

I decided to recreate the code on a new notebook to see if I would get the same summary sentences and in the same order as well, but I did not, instead I got different sentences. I am not sure why I did not get the same results, considering my two notebooks on Jupyter have the same code. Is there somewhere in the code as shown on the website that indicates that the code will always produce results at random or not in order?
Thank you.

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