Table 4 The structure of the three state-of-the-art OKE systems used in the experiment
From: Automatic transparency evaluation for open knowledge extraction systems
OKE systems | OKE systems’ components | ||
|---|---|---|---|
| Â | Entity and relation extraction | Resources | Conversion to RDF |
Booth et al. [23] | NLP2FHIR + PubTator | COVID-19 PICO Ontology | RDF Convertor |
Michel et al. [26] | DBpedia Spotlight + BioPortal Annotator + Entity-fishing | DCMI, Bibliographic, FOAF, Schema.org, WAV, and PROV-O | Morph-xR2RML |
Steenwinckel et al. [29] | DBpedia Spotlight + BioPortal Annotator + Crossref API + ORCID | COVID 19, CIDO, FLU, ans FaBio | YARRRML Parser |