cucumis | BDD Cucumber Style Asynchronous Testing Framework | Functional Testing library

As the title describes, I am trying to extract data from a website. Specifically, I'm trying to extract host susceptibility and host insusceptibility data from each of the species pages found here.

These data can be found on individual species specific pages, for example for Abelia latent tymovirus at its respective URL.

I am struggling to extract these data as the HTML seems to be very unstructured. For example, host susceptibility/insusceptibility always exists in node h4, but along with other varying headers and listitems.

This is my first go at web-scraping and I have been trying with the chrome plugin Web Scraper, which seems very intuitive and flexible. I have been able to get the scraper to visit the multiple pages, but I can't seem to direct it to specifically collect the susceptibility/insusceptibility data. I attempted using SelectorGadget to identify exactly what my selector should be, but the lack of structure in the HTML made this ineffective.

Any advice on how I can change my plan of attack for this?

I am also open to trying to extract the data using R's rvest package. I have so far been able to read the html from a specific page, extract the h4 and li elements, and clean up the line breaks. Reproducible code: