I had a similar thing on my website for ages (probably 10 years or so) based on the open text summary tool. It works pretty good and is completely open source:

I had a similar thing on my website for ages (probably 10 years or so) based on the open text summary tool. It works pretty good and is completely open source: https://www.splitbrain.org/services/ots https://www.splitbrain.org/services/ots