PubMed:32164424 / 833-839 JSONTXT

{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T128","span":{"begin":0,"end":6},"obj":"JJ"}],"text":"proven"}

{"project":"LitCovid-TimeML","denotations":[{"id":"tok151","span":{"begin":0,"end":6},"obj":"VBN"}],"text":"proven"}