I do know that reading data from tables in a manner that can be easily integrated and scaled within a broader semantic processing system is quite difficult. I'm not as focused on the space as I once was, so I'm not sure if the problem has been well solved yet.

I saw a presentation on this paper at SIGKDD this year. https://dl.acm.org/doi/10.1145/3394486.3406468 "Multi-modal Information Extraction from Text, Semi-structured, and Tabular Data on the Web"