Table 1

Extracted concepts from CORD-19 Dataset by knowledge base (semantic type) showing the number of unique terms found and the total number of extracted concepts from each knowledge base, as well as the number of papers containing terms from that knowledge base and the percentage coverage across the entire data set

Knowledge base	Unique terms	Extracted concepts	Papers	Coverage (%)
Body parts	1332	172 438	77 400	37
Core knowledge base	1434	338 552	102 037	49
Disease or syndrome	7195	507 819	152 402	73
Finding	5580	526 433	145 504	70
Genome	9395	419 413	86 073	41
Immunological factor	1845	130 996	45 912	22
Pharmacological substance	2599	58 308	30 494	15
Symptoms and side effects	8883	630 116	144 063	69
Therapeutic or preventive procedure	4923	332 260	111 277	54
Virus	1308	240 993	84 325	41
Total	44 494	3 357 328	195 958	94

Papers may contain multiple extracted concepts, and concepts may be found in multiple papers within the knowledge base; hence, we provide both all extracted concepts using the natural language processing tool in addition to the number of unique terms.
CORD-19, COVID-19 Open Research Dataset.