Highlight evidence from full text for extracted information

Goal is to have UX that can show excerpts of text supporting evidence from full text papers. 

Contraint: can only do it for open access papers

Have tried
 - k nearest embeddings - works OK but not perfect
 - prompting chatgpt to give sentences - failed miserably

An idea to improve k nearest embeddings
- chatpgpt to rerank top N embedding ranked sentences