How to understand Kobo highlights

Hi all

I just finished reading a friend's manuscript for his novel. He gave it to me as an epub on request, and I read it on my Kobo.

While reading I found many typos and grammatical errors. Whenever I found one I would highlight a word at or near the problem. I'm now realizing that that was a bad idea as the exported highlights are mostly meaningless (I have many "the" and "and" etc type words highlighted). I could go through them all and expand the highlight but it would be very tedious as there are close to 200.

I thought that perhaps I could figure out how to get more context by looking at the raw data in the KoboReader.sqllite file. What I see there is a bunch of items of a form like this:

untitled.html#point(/1/2/1/6833/1/1:431)

My question is: does anyone know how to interpret that? If I extract the untitled.html from the epub, how can I use that to get the surrounding context?

Thanks!
Graham