MinIE: Open Information Extraction system, GROBID, tet-pdf https://github.com/uma-pi1/minie https://github.com/kermitt2/grobid https://github.com/mon95/Automatic-Metadata-Extraction-from-Scientific-Documents https://www.pdflib.com/download/tet-pdf-ifilter/ https://www.molspaces.com/cb2bib/doc/contents/